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Li W, Heras D, Maris A, Melandri S, Lesarri A, Evangelisti L. A Rotational Study of 2-tert-Butylphenol and Its 1 : 1 Argon Complex. Chemphyschem 2024:e202400089. [PMID: 38502679 DOI: 10.1002/cphc.202400089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2024] [Revised: 03/15/2024] [Accepted: 03/18/2024] [Indexed: 03/21/2024]
Abstract
The chirped-pulse Fourier Transform microwave spectrum of 2-tert-butylphenol, an industrial intermediate for the production of antioxidants, has been investigated in the 2-8 GHz frequency range. The spectral analysis has allowed obtaining precise structural information on the most stable conformer and its complex with argon. The conformation of the monomer reveals that the hydroxyl group is coplanar with the ring but points in the opposite direction to the tert-butyl group, reducing steric interactions. In the tert-butyl group one methyl group is coplanar and the other two are symmetrically staggered respect to the ring. The complex shows the rare gas sitting above the aromatic ring. Interestingly, neither the monomer nor the complex exhibit large-amplitude hydroxyl torsion motions, previously observed in 2,6-disubstituted phenols such as 2,6-di-tert-butylphenol or propofol. The experimental results are supported by computational calculations, validating the molecular structure. Additionally, symmetry-adapted perturbation theory has allowed determining the van der Waals intermolecular interaction energy of the complex.
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Affiliation(s)
- Wenqin Li
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias -, I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
| | - Domingo Heras
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias -, I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
| | - Assimo Maris
- Department of Chemistry "G. Ciamician", University of Bologna, Via F. Selmi 2, 40126, Bologna, Italy
| | - Sonia Melandri
- Department of Chemistry "G. Ciamician", University of Bologna, Via F. Selmi 2, 40126, Bologna, Italy
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias -, I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
| | - Luca Evangelisti
- Department of Chemistry "G. Ciamician", University of Bologna, Via F. Selmi 2, 40126, Bologna, Italy
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Tama Saragi R, Li W, Juanes M, Enríquez L, Pinacho R, Rubio JE, Lesarri A. Rotational Spectroscopy and Conformational Flexibility of 2-Phenylethanethiol: The Dominant S-H⋅⋅⋅π Intramolecular Hydrogen Bond. Chemphyschem 2024; 25:e202300799. [PMID: 38282167 DOI: 10.1002/cphc.202300799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 01/30/2024]
Abstract
We present a rotational-computational investigation of the aromatic mercaptan 2-phenylethanethiol, addressing its potential energy surface, conformational equilibrium, internal dynamics and intramolecular interactions. The experiment used broadband chirped-pulse Fourier transform microwave spectroscopy in a supersonic jet expansion, recording the rotational spectrum in the 2-8 GHz frequency region. Two different conformers were detected in the spectrum. The most intense transitions correspond to a skew (gauche-gauche) conformation, identified as the global minimum. The spectra of ten different isotopologues were assigned for this species, leading to accurate effective and substitution structures. The weaker spectrum presents small tunnelling doublings caused by the torsional motion of the thiol group, which are only compatible with an antiperiplanar skeleton and a gauche thiol. The larger stability of the global minimum is attributed to an intramolecular S-H⋅⋅⋅π weak hydrogen bond. A comparison of the intramolecular interactions in the title molecule and 2-phenylethanol, similarly stabilized by a O-H⋅⋅⋅π hydrogen bond, shows the different strength of these interactions. Density functional (B3LYP-D3, B2PLYP-D3) and ab initio (MP2) calculations were conducted for the molecule.
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Affiliation(s)
- Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica -, I.U. CINQUIMA, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
- Present address: Institut für Ionenphysik und Angewandte Chemie, Universität Innsbruck, Technikerstr. 25/4. OG, 6020, Innsbruck, Austria
| | - Wenqin Li
- Departamento de Química Física y Química Inorgánica -, I.U. CINQUIMA, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica -, I.U. CINQUIMA, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
| | - Lourdes Enríquez
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén 11, 47011, Valladolid, Spain
| | - Ruth Pinacho
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén 11, 47011, Valladolid, Spain
| | - José Emiliano Rubio
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén 11, 47011, Valladolid, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica -, I.U. CINQUIMA, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
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Li W, Maris A, Melandri S, Lesarri A, Evangelisti L. The Structure of 2,6-Di- tert-butylphenol-Argon by Rotational Spectroscopy. Molecules 2023; 28:8111. [PMID: 38138596 PMCID: PMC10745844 DOI: 10.3390/molecules28248111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 11/27/2023] [Accepted: 12/12/2023] [Indexed: 12/24/2023] Open
Abstract
The molecular structure of a van der Waals-bonded complex involving 2,6-di-tert-butylphenol and a single argon atom has been determined through rotational spectroscopy. The experimentally derived structural parameters were compared to the outcomes of quantum chemical calculations that can accurately account for dispersive interactions in the cluster. The findings revealed a π-bound configuration for the complex, with the argon atom engaging the aromatic ring. The microwave spectrum reveals both fine and hyperfine tunneling components. The main spectral doubling is evident as two distinct clusters of lines, with an approximate separation of 179 MHz, attributed to the torsional motion associated with the hydroxyl group. Additionally, each component of this doublet further splits into three components, each with separations measuring less than 1 MHz. Investigation into intramolecular dynamics using a one-dimensional flexible model suggests that the main tunneling phenomenon originates from equivalent positions of the hydroxyl group. A double-minimum potential function with a barrier of 1000 (100) cm-1 effectively describes this extensive amplitude motion. However, the three-fold fine structure, potentially linked to internal motions within the tert-butyl group, requires additional scrutiny for a comprehensive understanding.
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Affiliation(s)
- Wenqin Li
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias—I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain;
| | - Assimo Maris
- Department of Chemistry “G. Ciamician”, University of Bologna, Via F. Selmi 2, 40126 Bologna, Italy; (A.M.); (S.M.)
| | - Sonia Melandri
- Department of Chemistry “G. Ciamician”, University of Bologna, Via F. Selmi 2, 40126 Bologna, Italy; (A.M.); (S.M.)
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias—I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain;
| | - Luca Evangelisti
- Department of Chemistry “G. Ciamician”, University of Bologna, Via S. Alberto 163, 48123 Ravenna, Italy
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Li W, Saragi RT, Juanes M, Demaison J, Vogt N, Fernández-Ramos A, Lesarri A. Equilibrium structures of selenium compounds: The torsionally flexible molecule of selenophenol. J Chem Phys 2023; 159:024303. [PMID: 37428062 DOI: 10.1063/5.0156413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Accepted: 06/15/2023] [Indexed: 07/11/2023] Open
Abstract
The equilibrium structure of selenophenol has been investigated using rotational spectroscopy and high-level quantum mechanical calculations, offering electronic and structural insight into the scarcely studied selenium compounds. The jet-cooled broadband microwave spectrum was measured in the 2-8 GHz cm-wave region using broadband (chirped-pulse) fast-passage techniques. Additional measurements up to 18 GHz used narrow-band impulse excitation. Spectral signatures were obtained for six isotopic species of selenium (80Se, 78Se, 76Se, 82Se, 77Se, and 74Se), together with different monosubstituted 13C species. The (unsplit) rotational transitions associated with the non-inverting μa-dipole selection rules could be partially reproduced with a semirigid rotor model. However, the internal rotation barrier of the selenol group splits the vibrational ground state into two subtorsional levels, doubling the dipole-inverting μb transitions. The simulation of the double-minimum internal rotation gives a very low barrier height (B3PW91: 42 cm-1), much smaller than for thiophenol (277 cm-1). A monodimensional Hamiltonian then predicts a huge vibrational separation of 72.2 GHz, justifying the non-observation of μb transitions in our frequency range. The experimental rotational parameters were compared with different MP2 and density functional theory calculations. The equilibrium structure was determined using several high-level ab initio calculations. A final Born-Oppenheimer (reBO) structure was obtained at the coupled-cluster CCSD(T)_ae/cc-wCVTZ level of theory, including small corrections for the wCVTZ → wCVQZ basis set enlargement calculated at the MP2 level. The mass-dependent method with predicates was used to produce an alternative rm(2) structure. The comparison between the two methods confirms the high accuracy of the reBO structure and offers information on other chalcogen-containing molecules.
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Affiliation(s)
- Wenqin Li
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Jean Demaison
- Faculty of Sciences, University of Ulm, 89069 Ulm, Germany
| | - Natalja Vogt
- Faculty of Sciences, University of Ulm, 89069 Ulm, Germany
| | - Antonio Fernández-Ramos
- Centro Singular de Investigación en Química Biológica y Materiales Moleculares (CIQUS), Campus Vida, Universidade de Santiago de Compostela, C/ Jenaro de la Fuente s/n, 15782 Santiago de Compostela, Spain
- Departamento de Química Física, Facultade de Química, Campus Vida, Universidade de Santiago de Compostela, Avda. das Ciencias s/n, 15782 Santiago de Compostela, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
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Jin Y, Li W, Saragi RT, Juanes M, Pérez C, Lesarri A, Feng G. Sulfur-arene interactions: the S⋯π and S-H⋯π interactions in the dimers of benzofuran⋯sulfur dioxide and benzofuran⋯hydrogen sulfide. Phys Chem Chem Phys 2023; 25:12174-12181. [PMID: 37070760 DOI: 10.1039/d3cp01146a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
Abstract
Non-covalent interactions between sulfur centers and aromatic rings play important roles in biological chemistry. We examined here the sulfur-arene interactions between the fused aromatic heterocycle benzofuran and two prototype sulfur divalent triatomics (sulfur dioxide and hydrogen sulfide). The weakly-bound adducts were generated in a supersonic jet expansion and characterized with broadband (chirped-pulsed) time-domain microwave spectroscopy. The rotational spectrum confirmed the detection of a single isomer for both heterodimers, consistent with the computational predictions for the global minima. The benzofuran⋯sulfur dioxide dimer exhibits a stacked structure with sulfur closer to benzofuran, while in benzofuran⋯hydrogen sulfide the two S-H bonds are oriented towards the bicycle. These binding topologies are similar to the corresponding benzene adducts, but offer increased interaction energies. The stabilizing interactions are described as S⋯π or S-H⋯π, respectively, using a combination of density-functional theory calculations (dispersion corrected B3LYP and B2PLYP), natural bond orbital theory, energy decomposition and electronic density analysis methods. The two heterodimers present a larger dispersion component, but nearly balanced by electrostatic contributions.
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Affiliation(s)
- Yan Jin
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, Chongqing 401331, China.
- Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belen, 7, 47011 Valladolid, Spain.
| | - Wenqin Li
- Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belen, 7, 47011 Valladolid, Spain.
| | - Rizalina Tama Saragi
- Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belen, 7, 47011 Valladolid, Spain.
| | - Marcos Juanes
- Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belen, 7, 47011 Valladolid, Spain.
| | - Cristóbal Pérez
- Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belen, 7, 47011 Valladolid, Spain.
| | - Alberto Lesarri
- Departamento de Quimica Fisica y Quimica Inorganica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belen, 7, 47011 Valladolid, Spain.
| | - Gang Feng
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, Chongqing 401331, China.
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Jin Y, Wang Z, Li W, Xu Y, Feng G, Lesarri A, Grabow JU. Probing the n → π* carbonyl-carbonyl interactions in the formaldehyde-trifluoroacetone dimer by rotational spectroscopy. J Chem Phys 2023; 158:124304. [PMID: 37003758 DOI: 10.1063/5.0144298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2023] Open
Abstract
The non-covalent bonding features of carbonyl-carbonyl interactions have been investigated in the dimer of formaldehyde and trifluoroacetone, using high resolution rotational spectroscopy combined with quantum chemical calculations. The observation of all possible isotopic substitutions for the heavy atoms in the complex enabled the determination of the accurate structure, characterized by the antiparallel arrangement of the two C=O bonds. The two moieties are connected through a dominant n → π* interaction enhanced by one weak C−H∙∙∙O hydrogen bond, as revealed by supporting natural bond orbital analysis and symmetry-adapted perturbation theory analysis. Further computational investigations on seventeen related adducts stabilized by carbonyl-carbonyl n → π* interactions show how the interaction strength is regulated by incorporation of either electron-donating or withdrawing functional groups.
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Affiliation(s)
| | | | - Wenqin Li
- Universidad de Valladolid Departamento Química Física y Química Inorgánica, Spain
| | | | - Gang Feng
- School of Chemistry and Chemical Engineering, Chongqing University, China
| | - Alberto Lesarri
- Departamento de Quimica Fisica y Quimica Inorganica, Universidad de Valladolid Departamento Química Física y Química Inorgánica, Spain
| | - Jens-Uwe Grabow
- Institut für Physikalische Chemie und Elektrochemie, Gottfried Wilhelm Leibniz Universität Hannover, Germany
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Saragi R, Calabrese C, Juanes M, Pinacho R, Rubio JE, Pérez C, Lesarri A. π-Stacking Isomerism in Polycyclic Aromatic Hydrocarbons: The 2-Naphthalenethiol Dimer. J Phys Chem Lett 2023; 14:207-213. [PMID: 36583611 PMCID: PMC9841560 DOI: 10.1021/acs.jpclett.2c03299] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Accepted: 12/22/2022] [Indexed: 06/17/2023]
Abstract
π-Stacking is a common descriptor for face-to-face attractive forces between aromatic hydrocarbons. However, the physical origin of this interaction remains debatable. Here we examined π-stacking in a model homodimer formed by two thiol-substituted naphthalene rings. Two isomers of the 2-naphthalenethiol dimer were discovered using rotational spectroscopy, sharing a parallel-displaced crossed orientation and absence of thiol-thiol hydrogen bonds. One of the isomers presents C2 symmetry, structurally analogous to the global minimum of the naphthalene dimer. The experimental data were rationalized with molecular orbital calculations, revealing a shallow potential energy surface. Noncovalent interactions are dominated by dispersion forces according to SAPT energy decomposition. In addition, the reduced electronic density shows a diffuse and extended region of inter-ring interactions, compatible with the description of π-stacking as a competition between dispersion and Pauli repulsion forces.
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Affiliation(s)
- Rizalina
Tama Saragi
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias - I.U. CINQUIMA, Universidad
de Valladolid, Paseo de Belén, 7, E-47011 Valladolid, Spain
| | - Camilla Calabrese
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias - I.U. CINQUIMA, Universidad
de Valladolid, Paseo de Belén, 7, E-47011 Valladolid, Spain
| | - Marcos Juanes
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias - I.U. CINQUIMA, Universidad
de Valladolid, Paseo de Belén, 7, E-47011 Valladolid, Spain
| | - Ruth Pinacho
- Departamento
de Electrónica, ETSIT, Universidad
de Valladolid, Paseo de Belén, 11, E-47011 Valladolid, Spain
| | - José Emiliano Rubio
- Departamento
de Electrónica, ETSIT, Universidad
de Valladolid, Paseo de Belén, 11, E-47011 Valladolid, Spain
| | - Cristóbal Pérez
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias - I.U. CINQUIMA, Universidad
de Valladolid, Paseo de Belén, 7, E-47011 Valladolid, Spain
| | - Alberto Lesarri
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias - I.U. CINQUIMA, Universidad
de Valladolid, Paseo de Belén, 7, E-47011 Valladolid, Spain
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Panwaria P, Juanes M, Mishra KK, Saragi R, Borish K, Usabiaga I, Camiruaga A, Fernández JA, Lesarri A, Das A. Microhydration of Phenyl Formate: Gas-Phase Laser Spectroscopy, Microwave Spectroscopy, and Quantum Chemistry Calculations. Chemphyschem 2022; 23:e202200330. [PMID: 35984348 DOI: 10.1002/cphc.202200330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 08/17/2022] [Indexed: 01/04/2023]
Abstract
Herein, we have investigated the structure of phenyl formate⋅⋅⋅water (PhOF⋅⋅⋅H2 O) dimer and various non-covalent interactions present there using gas-phase laser spectroscopy and microwave spectroscopy combined with quantum chemistry calculations. Two conformers of PhOF⋅⋅⋅H2 O (C1 and T1), built on the two cis/trans conformers of the bare molecule, have been observed in the experiment. In cis-PhOF, there is an nCO → π A r * ${{{\rm \pi }}_{{\rm A}{\rm r}}^{{\rm {^\ast}}}}$ interaction between the lone-pair orbital of the carbonyl oxygen atom and the π* orbital of the phenyl ring, which persists in the monohydrated C1 conformer of PhOF⋅⋅⋅H2 O according to the NBO and NCI analyses. On the other hand, this interaction is absent in the trans-PhOF conformer as the C=O group is away from the phenyl ring. The C1 conformer is primarily stabilized by an interplay between O-H⋅⋅⋅O=C hydrogen bond and O-H⋅⋅⋅π interactions, while the stability of the T1 conformer is primarily governed by the O-H⋅⋅⋅O=C hydrogen bond. The most important finding of the present work is that the conformational preference of the PhOF monomer is retained in its monohydrated complex.
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Affiliation(s)
- Prakash Panwaria
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011, Valladolid, Spain
| | - Kamal K Mishra
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India.,Present address: Department of Chemistry, University of Kentucky, Lexington, Kentucky, 40503, USA
| | - Rizalina Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011, Valladolid, Spain
| | - Kshetrimayum Borish
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
| | - Imanol Usabiaga
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa, 48940, Spain
| | - Ander Camiruaga
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa, 48940, Spain
| | - José A Fernández
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena s/n, Leioa, 48940, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011, Valladolid, Spain
| | - Aloke Das
- Department of Chemistry, Indian Institute of Science Education and Research Pune, Dr. Homi Bhabha Road, Pashan, Pune, 411008, India
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Camiruaga A, Saragi RT, Torres-Hernández F, Juanes M, Usabiaga I, Lesarri A, Fernández JA. The evolution towards cyclic structures in the aggregation of aromatic alcohols: the dimer, trimer and tetramer of 2-phenylethanol. Phys Chem Chem Phys 2022; 24:24800-24809. [PMID: 36214363 DOI: 10.1039/d2cp03485a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Gas-phase spectroscopic studies of alcohol clusters offer accurate information on the influence of non-covalent interactions on molecular recognition, and are of paramount importance to model supramolecular and biological chemical processes. Here, we examine the role of the aliphatic side chain in the self-aggregation of aromatic alcohols, using a multi-methodological gas-phase approach which combines microwave spectroscopy and mass-resolved electronic and vibrational laser spectroscopy. Spectroscopic and electronic structure computations were carried out for the dimer, trimer and tetramer of 2-phenylethanol, extending previous investigations on smaller aromatic alcohols. While the conformational flexibility of the ethyl group anticipates a variety of torsional isomers, the intra- and inter-molecular interactions restrict molecular conformations and favour particularly stable isomers. The conformational landscape of the clusters is very shallow and multiple competing isomers were rotationally and/or vibrationally detected, including three dimer species, two trimers and two tetramers. Cluster growth is associated with a tendency to form cyclic hydrogen bond structures.
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Affiliation(s)
- Ander Camiruaga
- Dep. of Physical Chemistry, Fac. of Science and Technology, University of the Basque Country (UPV/EHU), Bo̲ Sarriena S/N, Leioa, 48940, Spain.
| | - Rizalina Tama Saragi
- Dep. of Physical Chemistry and Inorganic Chemistry, Fac. of Sciences - I.U. CINQUIMA, University of Valladolid, Paseo de Belén, 7, 47011, Valladolid, Spain
| | - Fernando Torres-Hernández
- Dep. of Physical Chemistry, Fac. of Science and Technology, University of the Basque Country (UPV/EHU), Bo̲ Sarriena S/N, Leioa, 48940, Spain.
| | - Marcos Juanes
- Dep. of Physical Chemistry and Inorganic Chemistry, Fac. of Sciences - I.U. CINQUIMA, University of Valladolid, Paseo de Belén, 7, 47011, Valladolid, Spain
| | - Imanol Usabiaga
- Dep. of Physical Chemistry, Fac. of Science and Technology, University of the Basque Country (UPV/EHU), Bo̲ Sarriena S/N, Leioa, 48940, Spain.
| | - Alberto Lesarri
- Dep. of Physical Chemistry and Inorganic Chemistry, Fac. of Sciences - I.U. CINQUIMA, University of Valladolid, Paseo de Belén, 7, 47011, Valladolid, Spain
| | - José A Fernández
- Dep. of Physical Chemistry, Fac. of Science and Technology, University of the Basque Country (UPV/EHU), Bo̲ Sarriena S/N, Leioa, 48940, Spain.
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10
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Steber A, Li W, Pate BH, Lesarri A, Pérez C. The First Stages of Nanomicelle Formation Captured in the Sevoflurane Trimer. J Phys Chem Lett 2022; 13:3770-3775. [PMID: 35446045 PMCID: PMC9059180 DOI: 10.1021/acs.jpclett.2c00671] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Accepted: 04/05/2022] [Indexed: 06/14/2023]
Abstract
Self-aggregation of sevoflurane, an inhalable, fluorinated anesthetic, provides a challenge for current state-of-the-art high-resolution techniques due to its large mass and the variety of possible hydrogen bonds between monomers. Here we present the observation of sevoflurane trimer by chirped-pulse Fourier transform microwave spectroscopy, identified through the interplay of experimental and computational methods. The trimer (>600 Da), one of the largest molecular aggregates observed through rotational spectroscopy, does not resemble the binding (C-H···O) motif of the already characterized sevoflurane dimer, instead adapting a new binding configuration created predominantly from 17 CH···F hydrogen bonds that resembles a nanomicellar arrangement. The observation of such a heavy aggregate highlights the potential of rotational spectroscopy to study larger biochemical systems in the limit of spectroscopic congestion but also showcases the challenges ahead as the mass of the system increases.
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Affiliation(s)
- Amanda
L. Steber
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias-I.U. CINQUIMA, Universidad
de Valladolid, E-47011 Valladolid, Spain
| | - Wenqin Li
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias-I.U. CINQUIMA, Universidad
de Valladolid, E-47011 Valladolid, Spain
| | - Brooks H. Pate
- Department
of Chemistry, University of Virginia, Charlottesville, Virginia 22904-4319, United States
| | - Alberto Lesarri
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias-I.U. CINQUIMA, Universidad
de Valladolid, E-47011 Valladolid, Spain
| | - Cristóbal Pérez
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias-I.U. CINQUIMA, Universidad
de Valladolid, E-47011 Valladolid, Spain
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11
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Juanes M, Saragi RT, Pérez C, Evangelisti L, Enríquez L, Jaraíz M, Lesarri A. Hydrogen Bonding in the Dimer and Monohydrate of 2-Adamantanol: A Test Case for Dispersion-Corrected Density Functional Methods. Molecules 2022; 27:molecules27082584. [PMID: 35458782 PMCID: PMC9030514 DOI: 10.3390/molecules27082584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Revised: 04/10/2022] [Accepted: 04/15/2022] [Indexed: 11/29/2022]
Abstract
Weakly-bound intermolecular clusters constitute reductionist physical models for non-covalent interactions. Here we report the observation of the monomer, the dimer and the monohydrate of 2-adamantanol, a secondary alcohol with a bulky ten-carbon aliphatic skeleton. The molecular species were generated in a supersonic jet expansion and characterized using broadband chirped-pulse microwave spectroscopy in the 2–8 GHz frequency region. Two different gauche-gauche O-H···O hydrogen-bonded isomers were observed for the dimer of 2-adamantanol, while a single isomer was observed for the monomer and the monohydrate. The experimental rotational parameters were compared with molecular orbital calculations using density functional theory (B3LYP-D3(BJ), B2PLYP-D3(BJ), CAM-B3LYP-D3(BJ), ωB97XD), additionally providing energetic and electron density characterization. The shallow potential energy surface makes the dimer an interesting case study to benchmark dispersion-corrected computational methods and conformational search procedures.
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Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias—I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain; (M.J.); (R.T.S.); (C.P.)
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias—I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain; (M.J.); (R.T.S.); (C.P.)
| | - Cristóbal Pérez
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias—I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain; (M.J.); (R.T.S.); (C.P.)
| | - Luca Evangelisti
- Dipartimento di Chimica ‘‘Giacomo Ciamician’’, Università di Bologna, Via Selmi, 2, 40126 Bologna, Italy;
| | - Lourdes Enríquez
- Departamento de Electrónica, Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad de Valladolid, Paseo de Belén, 15, 47011 Valladolid, Spain; (L.E.); (M.J.)
| | - Martín Jaraíz
- Departamento de Electrónica, Escuela Técnica Superior de Ingenieros de Telecomunicación, Universidad de Valladolid, Paseo de Belén, 15, 47011 Valladolid, Spain; (L.E.); (M.J.)
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias—I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain; (M.J.); (R.T.S.); (C.P.)
- Correspondence: ; Tel.: +34-983-185895
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12
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Juanes M, Saragi RT, Pérez C, Enríquez L, Jaraíz M, Lesarri A. Torsional chirality and molecular recognition: the homo and heterochiral dimers of thenyl and furfuryl alcohol. Phys Chem Chem Phys 2022; 24:8999-9006. [PMID: 35380144 DOI: 10.1039/d2cp00479h] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Furfuryl alcohol and thenyl alcohol contain a labile torsional chiral center, producing transiently chiral enantiomers interconverting in the nanosecond time-scale. We explored chiral molecular recognition using the weakly-bound intermolecular dimers of both alcohols, freezing stereomutation. Supersonic jet broadband microwave spectroscopy revealed homo and heterochiral diastereoisomers for each alcohol dimer and the structural characteristics of the clusters. All dimers are primarily stabilized by a moderately intense O-H⋯O hydrogen bond, but differ in the secondary interactions, which introduce additional hydrogen bonds either to the ring oxygen in furfuryl alcohol or to the π ring system in thenyl alcohol. Density-functional calculations (B2PLYP-D3(BJ)/def2-TZVP) show no clear preferences for a particular stereochemistry in the dimers, with relative energies of the order 1-2 kJ mol-1. The study suggests opportunities for the investigation of chiral recognition in molecules with torsional barriers in between transient and permanent interconversion regimes.
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Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain.
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain.
| | - Cristóbal Pérez
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain.
| | - Lourdes Enríquez
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén 15, 47011 Valladolid, Spain
| | - Martín Jaraíz
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén 15, 47011 Valladolid, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain.
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13
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Cabezas C, Peña I, Saragi RT, Juanes M, Lesarri A, Cernicharo J. Rotational spectroscopy of the large saturated dinitriles hexanedinitrile and heptanedinitrile. Spectrochim Acta A Mol Biomol Spectrosc 2022; 270:120844. [PMID: 35007907 DOI: 10.1016/j.saa.2021.120844] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 12/08/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Dinitriles with a saturated hydrocarbon skeleton and a -C≡N group at each end can have large electric dipole moments. Their formation can be related to highly reactive radicals such as CH2CN, C2N, or CN. Thus, these saturated dinitriles are potential candidates to be observed in the interstellar medium. In this work, two members of this family, hexanedinitrile and heptanedinitrile, have been investigated through their rotational spectra. The jet-cooled broadband chirped-pulse Fourier transform microwave spectra of both molecules were measured in the 2-8 GHz frequency region. Three and six conformers of hexanedinitrile and heptanedinitrile, respectively, were detected and assigned based on the rotational and quadrupole coupling constants.
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Affiliation(s)
- Carlos Cabezas
- Instituto de Física Fundamental (IFF-CSIC), Group of Molecular Astrophysics, C/ Serrano 121, Madrid 28006, Spain.
| | - Isabel Peña
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain.
| | - Rizalina T Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - José Cernicharo
- Instituto de Física Fundamental (IFF-CSIC), Group of Molecular Astrophysics, C/ Serrano 121, Madrid 28006, Spain
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14
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Cabezas C, Juanes M, Saragi RT, Lesarri A, Peña I. Water binding to the atmospheric oxidation product methyl vinyl ketone. Spectrochim Acta A Mol Biomol Spectrosc 2022; 270:120846. [PMID: 35033807 DOI: 10.1016/j.saa.2021.120846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Accepted: 12/29/2021] [Indexed: 06/14/2023]
Abstract
Methyl vinyl ketone is one of the major oxidation products of isoprene, and therefore, an important precursor of secondary organic aerosol. Understanding its interactions with water is relevant to gain insight into aerosol formation and improve the predictive power of atmospheric chemistry models. The molecular complex formed between methyl vinyl ketone and water has been generated in a supersonic jet and characterized using high-resolution microwave spectroscopy in combination with quantum chemistry calculations. In this study, we show that methyl vinyl ketone interacts with water forming four 1:1 isomers connected by O - H···O and C - H···O hydrogen bond interactions. Water has been found to preferentially bind to the antiperiplanar conformation of methyl vinyl ketone. Evidence of a large amplitude motion arising from the methyl internal rotation has been found in the rotational spectra of the dimer. The threefold methyl internal rotation barrier heights have been further determined and discussed for all the species.
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Affiliation(s)
- Carlos Cabezas
- Instituto de Física Fundamental (IFF-CSIC), Group of Molecular Astrophysics, C/ Serrano 121, Madrid 28006, Spain.
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Rizalina T Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Isabel Peña
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain.
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15
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Saragi RT, Juanes M, Abad JL, Pinacho R, Rubio JE, Lesarri A. Chirality-Puckering correlation and intermolecular interactions in Sphingosines: Rotational spectroscopy of jaspine B3 and its monohydrate. Spectrochim Acta A Mol Biomol Spectrosc 2022; 267:120531. [PMID: 34857464 DOI: 10.1016/j.saa.2021.120531] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/09/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Chirality is determinant for sphingosine biofunctions and pharmacological activity, yet the reasons for the biological chiral selection are not well understood. Here, we characterized the intra- and intermolecular interactions at the headgroup of the cytotoxic anhydrophytosphingosine jaspine B, revealing chirality-dependent correlations between the puckering of the ring core and the formation of amino-alcohol hydrogen bond networks, both in the monomer and the monohydrate. Following the specific synthesis of a shortened 3-carbon side-chain molecule, denoted jaspine B3, six different isomers were observed in a jet expansion using broadband (chirped-pulsed) rotational spectroscopy. Additionally, a single isomer of the jaspine B3 monohydrate was observed, revealing the insertion of water in between the hydroxy and amino groups and the formation of a network of O-H···N-H···Oring hydrogen bonds. The specific jaspine B3 stereochemistry thus creates a double-faced molecule where the exposed lone-pair electrons may easily catalyze the formation of intermolecular aggregates and determine the sphingosine biological properties.
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Affiliation(s)
- Rizalina T Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
| | - José L Abad
- Research Unit on BioActive Molecules (RUBAM), Departament de Química Biològica, Institut de Química Avançada de Catalunya (IQAC-CSIC), Jordi Girona 18-26, Barcelona 08034, Spain
| | - Ruth Pinacho
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén 11 Valladolid 47011, Spain
| | - José E Rubio
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén 11 Valladolid 47011, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén 7, Valladolid 47011, Spain
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16
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Medel R, Camiruaga A, Saragi RT, Pinacho P, Pérez C, Schnell M, Lesarri A, Suhm MA, Fernández JA. Rovibronic signatures of molecular aggregation in the gas phase: subtle homochirality trends in the dimer, trimer and tetramer of benzyl alcohol. Phys Chem Chem Phys 2021; 23:23610-23624. [PMID: 34661223 DOI: 10.1039/d1cp03508h] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Molecular aggregation is of paramount importance in many chemical processes, including those in living beings. Thus, characterization of the intermolecular interactions is an important step in its understanding. We describe here the aggregation of benzyl alcohol at the molecular level, a process governed by a delicate equilibrium between OH⋯O and OH⋯π hydrogen bonds and dispersive interactions. Using microwave, FTIR, Raman and mass-resolved double-resonance IR/UV spectroscopic techniques, we explored the cluster growth up to the tetramer and found a complex landscape, partly due to the appearance of multiple stereoisomers of very similar stability. Interestingly, a consistently homochiral synchronization of transiently chiral monomer conformers was observed during cluster growth to converge in the tetramer, where the fully homochiral species dominates the potential energy surface. The data on the aggregation of benzyl alcohol also constitute an excellent playground to fine-tune the parameters of the most advanced functionals.
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Affiliation(s)
- Robert Medel
- Institute of Physical Chemistry, University of Goettingen, Tammannstr. 6, 37077 Goettingen, Germany.
| | - Ander Camiruaga
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena S/N, 4894 Leioa, Spain.
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Pablo Pinacho
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany.,Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 1, 24118 Kiel, Germany
| | - Cristóbal Pérez
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany.,Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 1, 24118 Kiel, Germany
| | - Melanie Schnell
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany.,Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 1, 24118 Kiel, Germany
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Martin A Suhm
- Institute of Physical Chemistry, University of Goettingen, Tammannstr. 6, 37077 Goettingen, Germany.
| | - José A Fernández
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Barrio Sarriena S/N, 4894 Leioa, Spain.
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17
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Demaison J, Vogt N, Jin Y, Saragi RT, Juanes M, Lesarri A. How accurate is the determination of equilibrium structures for van der Waals complexes? The dimer N 2O⋯CO as an example. J Chem Phys 2021; 154:194302. [PMID: 34240896 DOI: 10.1063/5.0048603] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Plausible methods for accurate determination of equilibrium structures of intermolecular clusters have been assessed for the van der Waals dimer N2O⋯CO. In order to assure a large initial dataset of rotational parameters, we first measured the microwave spectra of the 15N2O⋯12CO and 15N2O⋯13CO isotopologs, expanding previous measurements. Then, an anharmonic force field was calculated ab initio and a semi-experimental equilibrium structure was determined. The dimer structure was also calculated at the coupled-cluster level of theory using very large basis sets with diffuse functions and counterpoise correction. It was found that the contributions of the diffuse functions and the counterpoise correction are not additive and do not compensate each other although they have almost the same value but opposite signs. The semi-experimental and ab initio structures were found to be in fair agreement, with the equilibrium distance between the centers of mass of both monomers being 3.825(13) Å and the intermolecular bond length r(C⋯O) = 3.300(9) Å. In this case, the mass-dependent method did not permit us to determine reliable intermolecular parameters. The combination of experimental rotational constants and results of ab initio calculations thus proves to be very sensitive to examine the accuracy of structural determinations in intermolecular clusters, offering insight into other aggregates.
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Affiliation(s)
- Jean Demaison
- Section of Chemical Information Systems, University of Ulm, Albert Einstein Allee 47, 89081 Ulm, Germany
| | - Natalja Vogt
- Section of Chemical Information Systems, University of Ulm, Albert Einstein Allee 47, 89081 Ulm, Germany
| | - Yan Jin
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias - I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
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18
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Jin Y, Saragi RT, Juanes M, Feng G, Lesarri A. Interaction topologies of the SO chalcogen bond: the conformational equilibrium of the cyclohexanolSO 2 cluster. Phys Chem Chem Phys 2021; 23:10799-10806. [PMID: 33928998 DOI: 10.1039/d1cp00997d] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conformational landscape of the cyclohexanolSO2 cluster was revealed in the gas phase using chirped-pulsed broadband rotational spectroscopy and quantum chemical calculations. Four isomers stabilized by a dominant SO chalcogen bond and cooperative C-HO[double bond, length as m-dash]S and O-HO[double bond, length as m-dash]S secondary weak hydrogen bonds were observed, with a near-parallel orientation of the S[double bond, length as m-dash]O and O-H bonds. Isomers formed by equatorial-gauche cyclohexanol are more stable than the isomers containing axial cyclohexanol. The multiple conformations of cyclohexanol and the versatile binding properties of SO2, simultaneously operating as nucleophile and electrophile through its π-holes and non-bonding electrons lead to a complex conformational behavior when the cluster is formed. The long (2.64-2.85 Å) attractive SO interaction between SO2 and cyclohexanol is mainly electrostatic and the contribution of charge transfer is obvious, with an NBO analysis suggesting that the strength of the SO interaction is nearly two orders of magnitude larger than the hydrogen bonds. This study provides molecular insights into the structural and energetic characteristics that determine the formation of pre-nucleation clusters between SO2 and a volatile organic compound like cyclohexanol.
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Affiliation(s)
- Yan Jin
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd 55, Chongqing, 401331, China. and Departamento de Química Física y Química Inorgánica-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain.
| | - Rizalina T Saragi
- Departamento de Química Física y Química Inorgánica-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain.
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain.
| | - Gang Feng
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd 55, Chongqing, 401331, China.
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain.
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19
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Nair KPR, Herbers S, Bailey WC, Obenchain DA, Lesarri A, Grabow JU, Nguyen HVL. Internal rotation and chlorine nuclear quadrupole coupling in 2-chloro-4-fluorotoluene explored by microwave spectroscopy and quantum chemistry. Spectrochim Acta A Mol Biomol Spectrosc 2021; 247:119120. [PMID: 33189979 DOI: 10.1016/j.saa.2020.119120] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/11/2020] [Accepted: 10/13/2020] [Indexed: 06/11/2023]
Abstract
2-Chloro-4-fluorotoluene was investigated using a combination of molecular jet Fourier transform microwave spectroscopy in the frequency range from 5 to 21 GHz and quantum chemistry. The molecule experiences an internal rotation of the methyl group, which causes fine splittings of all rotational transitions into doublets with separation on the order of a few tens of kHz. In addition, hyperfine effects originating from the chlorine nuclear quadrupole moment coupling its nuclear spin to the end-over-end rotation of the molecule are observed. The torsional barrier was derived using both the rho and the combined-axis-method, giving a value of 462.5(41) cm-1. Accurate rotational constants and quadrupole coupling constants were determined for the 35Cl and 37Cl isotopologues and compared with Bailey's semi-experimental quantum chemical predictions. The gas phase molecular structure was deduced from the experimental rotational constants supplemented with those calculated by quantum chemistry at various levels of theory. The values of the methyl torsional barrier and chlorine nuclear quadrupole coupling constants were compared with the theoretical predictions and with those of other chlorotoluene derivatives.
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Affiliation(s)
- K P Rajappan Nair
- Institut für Physikalische Chemie und Elektrochemie, Gottfried-Wilhelm-Leibniz-Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany; Department of Atomic and Molecular Physics, Manipal Academy of Higher Education, Manipal 576104, India.
| | - Sven Herbers
- Institut für Physikalische Chemie und Elektrochemie, Gottfried-Wilhelm-Leibniz-Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - William C Bailey
- Chemistry-Physics Department, Kean University, 1000 Morris Avenue, Union, NJ, USA
| | - Daniel A Obenchain
- Institut für Physikalische Chemie und Elektrochemie, Gottfried-Wilhelm-Leibniz-Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica - I.U. CINQUIMA, Facultad de Ciencias, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Jens-Uwe Grabow
- Institut für Physikalische Chemie und Elektrochemie, Gottfried-Wilhelm-Leibniz-Universität Hannover, Callinstraße 3A, 30167 Hannover, Germany
| | - Ha Vinh Lam Nguyen
- Laboratoire Interuniversitaire des Systèmes Atmosphériques (LISA), CNRS UMR 7583, Université Paris-Est Créteil, Université de Paris, Institut Pierre Simon Laplace, 61 Avenue du Général de Gaulle, 94010 Créteil, France; Institut Universitaire de France (IUF), 1 rue Descartes, 75231 Paris Cedex 05, France.
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Saragi R, Juanes M, Pérez C, Pinacho P, Tikhonov DS, Caminati W, Schnell M, Lesarri A. Switching Hydrogen Bonding to π-Stacking: The Thiophenol Dimer and Trimer. J Phys Chem Lett 2021; 12:1367-1373. [PMID: 33507084 PMCID: PMC8812119 DOI: 10.1021/acs.jpclett.0c03797] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We used jet-cooled broadband rotational spectroscopy to explore the balance between π-stacking and hydrogen-bonding interactions in the self-aggregation of thiophenol. Two different isomers were detected for the thiophenol dimer, revealing dispersion-controlled π-stacked structures anchored by a long S-H···S sulfur hydrogen bond. The weak intermolecular forces allow for noticeable internal dynamics in the dimers, as tunneling splittings are observed for the global minimum. The large-amplitude motion is ascribed to a concerted inversion motion between the two rings, exchanging the roles of the proton donor and acceptor in the thiol groups. The determined torsional barrier of B2 = 250.3 cm-1 is consistent with theoretical predictions (290-502 cm-1) and the monomer barrier of 277.1(3) cm-1. For the thiophenol trimer, a symmetric top structure was assigned in the spectrum. The results highlight the relevance of substituent effects to modulate π-stacking geometries and the role of the sulfur-centered hydrogen bonds.
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Affiliation(s)
- Rizalina
Tama Saragi
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias-I.U. CINQUIMA, Universidad
de Valladolid, Paseo de Belén, 7, E-47011 Valladolid, Spain
| | - Marcos Juanes
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias-I.U. CINQUIMA, Universidad
de Valladolid, Paseo de Belén, 7, E-47011 Valladolid, Spain
| | - Cristóbal Pérez
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- Institut
für Physikalische Chemie, Christian-Albrechts-Universität
zu Kiel, Max-Eyth-Str.
1, D-24118 Kiel, Germany
| | - Pablo Pinacho
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- Institut
für Physikalische Chemie, Christian-Albrechts-Universität
zu Kiel, Max-Eyth-Str.
1, D-24118 Kiel, Germany
| | - Denis S. Tikhonov
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- Institut
für Physikalische Chemie, Christian-Albrechts-Universität
zu Kiel, Max-Eyth-Str.
1, D-24118 Kiel, Germany
| | - Walther Caminati
- Dipartimento
di Chimica Giacomo Ciamician, Via Selmi, 2, I-40126 Bologna, Italy
| | - Melanie Schnell
- Deutsches
Elektronen-Synchrotron DESY, Notkestraße 85, D-22607 Hamburg, Germany
- Institut
für Physikalische Chemie, Christian-Albrechts-Universität
zu Kiel, Max-Eyth-Str.
1, D-24118 Kiel, Germany
| | - Alberto Lesarri
- Departamento
de Química Física y Química Inorgánica,
Facultad de Ciencias-I.U. CINQUIMA, Universidad
de Valladolid, Paseo de Belén, 7, E-47011 Valladolid, Spain
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21
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Juanes M, Saragi RT, Enríquez L, Jaraíz M, Lesarri A. Molecular Rotation Spectrum of Tetracyclic Quinolizidines: Observation of trans-Matrine and the Elusive cis-Matrine. J Org Chem 2021; 86:1861-1867. [PMID: 33405924 DOI: 10.1021/acs.joc.0c02689] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
We characterized the bis-quinolizidine tetracyclic alkaloid (5S, 6S, 7R, 11R)-matrine in a supersonic jet expansion, using chirped-pulsed broadband microwave spectroscopy. Previous crystal diffraction analyses suggested 16 diastereoisomers associated with matrine's four carbon stereocenters but were inconclusive whether the lactamic nitrogen atom would additionally produce separated trans-/cis- diastereoisomers or if both species may interconvert through low potential barriers. Our experiment simultaneously detected trans- and cis-matrine through their rotational spectrum, confirming the possibility of conformational rearrangement in matrine alkaloids. The two matrine conformers mainly differ in the envelope or half-chair lactamic ring, as evidenced by the experimental rotational and nuclear quadrupole coupling parameters. Molecular orbital calculations with ab initio (MP2) and density functional methods (B3LYP-D3(BJ) and MN15) were tested against the experiment, additionally offering an estimation of the cis-/trans- barrier of 24.9-26.9 kJ mol-1. The experiment illustrates the structural potential of chirped-pulsed broadband microwave spectroscopy for high-resolution rotational studies of biomolecules in the range of 20-40 atoms.
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Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Lourdes Enríquez
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén, 11, 47011 Valladolid, Spain
| | - Martín Jaraíz
- Departamento de Electrónica, ETSIT, Universidad de Valladolid, Paseo de Belén, 11, 47011 Valladolid, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias-I.U. CINQUIMA, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
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Millan J, Lesarri A, Fernández JA, Martínez R. Exploring Epigenetic Marks by Analysis of Noncovalent Interactions. Chembiochem 2020; 22:408-415. [PMID: 32815664 DOI: 10.1002/cbic.202000380] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 08/19/2020] [Indexed: 01/28/2023]
Abstract
Epigenetic marks are modest chemical modifications on DNA and histone proteins that regulate the activation or silencing of genes through modulation of the intermolecular interactions between the DNA strands and the protein machinery. The process is complex and not always well understood. One of the systems studied in greater detail is the epigenetic mark on H3K9: lysine 9 of histone 3. The degree of methylation or acetylation of this histone is linked to silencing or activation of the corresponding gene, but it is not clear which effect each mark has in gene expression. We shed light on this particular methylation process by using density functional theory (DFT) calculations. First, we built a model consisting of a DNA double strand containing three base pairs and a sequence of three amino acids of the histone's tail. Then, we computed the modulation introduced into the intermolecular interactions by each epigenetic modification: from mono- to trimethylation and acetylation. The calculations show that whereas acetylation and trimethylation result in a reduction of the DNA-peptide interaction; non-, mono-, and dimethylation increase the intermolecular interactions. Such observations compare well with the findings reported in the literature, and highlight the correlation between the balance of intermolecular forces and biological properties, simultaneously advancing quantum-mechanical studies of large biochemical systems at molecular level through the use of DFT methods.
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Affiliation(s)
- Judith Millan
- Departamento de Química, Facultad de Ciencia y Tecnología, Universidad de La Rioja, Madre de Dios, 53, Logroño, 26006, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, I.U. CINQUIMA, Universidad de Valladolid, Valladolid, 47011, Spain
| | - José A Fernández
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco-UPV/EHU, Barrio Sarriena s/n, Leioa, 48940, Spain
| | - Rodrigo Martínez
- Departamento de Química, Facultad de Ciencia y Tecnología, Universidad de La Rioja, Madre de Dios, 53, Logroño, 26006, Spain
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Juanes M, Usabiaga I, León I, Evangelisti L, Fernández JA, Lesarri A. The Six Isomers of the Cyclohexanol Dimer: A Delicate Test for Dispersion Models. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202005063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica—I.U. CINQUIMA Universidad de Valladolid Paseo de Belén, 7 47011 Valladolid Spain
| | - Imanol Usabiaga
- Departamento de Química Física Universidad del País Vasco Ap. 644 48080 Bilbao Spain
- Instituto Biofisika (CSIC, UPV/EHU) 48940 Leioa Spain
| | - Iker León
- Departamento de Química Física y Química Inorgánica—I.U. CINQUIMA Universidad de Valladolid Paseo de Belén, 7 47011 Valladolid Spain
- Departamento de Química Física Universidad del País Vasco Ap. 644 48080 Bilbao Spain
| | - Luca Evangelisti
- Dipartimento di Chimica “G. Ciamician” Università di Bologna Via Selmi, 2 40126 Bologna Italy
| | - José A. Fernández
- Departamento de Química Física Universidad del País Vasco Ap. 644 48080 Bilbao Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica—I.U. CINQUIMA Universidad de Valladolid Paseo de Belén, 7 47011 Valladolid Spain
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Juanes M, Usabiaga I, León I, Evangelisti L, Fernández JA, Lesarri A. The Six Isomers of the Cyclohexanol Dimer: A Delicate Test for Dispersion Models. Angew Chem Int Ed Engl 2020; 59:14081-14085. [DOI: 10.1002/anie.202005063] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/11/2020] [Indexed: 11/06/2022]
Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica—I.U. CINQUIMA Universidad de Valladolid Paseo de Belén, 7 47011 Valladolid Spain
| | - Imanol Usabiaga
- Departamento de Química Física Universidad del País Vasco Ap. 644 48080 Bilbao Spain
- Instituto Biofisika (CSIC, UPV/EHU) 48940 Leioa Spain
| | - Iker León
- Departamento de Química Física y Química Inorgánica—I.U. CINQUIMA Universidad de Valladolid Paseo de Belén, 7 47011 Valladolid Spain
- Departamento de Química Física Universidad del País Vasco Ap. 644 48080 Bilbao Spain
| | - Luca Evangelisti
- Dipartimento di Chimica “G. Ciamician” Università di Bologna Via Selmi, 2 40126 Bologna Italy
| | - José A. Fernández
- Departamento de Química Física Universidad del País Vasco Ap. 644 48080 Bilbao Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica—I.U. CINQUIMA Universidad de Valladolid Paseo de Belén, 7 47011 Valladolid Spain
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Insausti A, Calabrese C, Parra M, Usabiaga I, Vallejo-López M, Écija P, Basterretxea FJ, Grabow JU, Caminati W, Lesarri A, Cocinero EJ. Conformational impact of aliphatic side chains in local anaesthetics: benzocaine, butamben and isobutamben. Chem Commun (Camb) 2020; 56:6094-6097. [PMID: 32352456 DOI: 10.1039/d0cc00760a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
We studied the impact of aliphatic side chains on the stability and conformational landscape of the local anaesthetics benzocaine, butamben and isobutamben, combining high-resolution rotational spectroscopy in the microwave and millimetre regions and molecular modelling. The study reveals the connections between alkyl chain flexibility and molecular conformations.
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Affiliation(s)
- A Insausti
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU), Leioa, 48940, Spain.
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Juanes M, Saragi RT, Pinacho R, Rubio JE, Lesarri A. Sulfur hydrogen bonding and internal dynamics in the monohydrates of thenyl mercaptan and thenyl alcohol. Phys Chem Chem Phys 2020; 22:12412-12421. [DOI: 10.1039/d0cp01706j] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Water forms weak H-bonds with thenyl compounds, simultaneously retaining internal mobility in the dimer.
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Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica and I.U. CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid, Paseo de Belén, 7
- 47011 Valladolid
- Spain
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica and I.U. CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid, Paseo de Belén, 7
- 47011 Valladolid
- Spain
| | - Ruth Pinacho
- Departamento de Electrónica
- Escuela de Ingeniería de Telecomunicaciones
- Universidad de Valladolid
- Paseo de Belén, 15
- 47011 Valladolid
| | - José E. Rubio
- Departamento de Electrónica
- Escuela de Ingeniería de Telecomunicaciones
- Universidad de Valladolid
- Paseo de Belén, 15
- 47011 Valladolid
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica and I.U. CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid, Paseo de Belén, 7
- 47011 Valladolid
- Spain
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Saragi RT, Juanes M, Caminati W, Lesarri A, Enríquez L, Jaraíz M. Rotational Spectrum, Tunneling Motions, and Intramolecular Potential Barriers in Benzyl Mercaptan. J Phys Chem A 2019; 123:8435-8440. [PMID: 31487179 DOI: 10.1021/acs.jpca.9b06921] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The rotational spectrum of benzyl mercaptan (parent and four isotopologues) has been assigned in a supersonic jet expansion using chirped-pulse Fourier transform microwave spectroscopy. The spectrum is characterized by torsional tunneling doublings, strongly perturbed by Coriolis interactions. The experimental rotational constants reveal that the sulfur atom is located above the ring plane in a gauche conformation. The torsion dihedral θ0 = φ (SCα-C1C2) is approximately 74°, according to a flexible molecular model calculation reproducing the energy separation (ΔE01 ∼ 2180.4 MHz) between the first two torsional substates. The global minimum configuration is 4-fold degenerate, corresponding to potential minima with θ0 ≈ ±74° and ±(180-74)°. The four equivalent minima are separated by potential barriers at θ = ±90°, 0°, or 180°. The tunneling splittings are caused by the potential barrier at θ = ± 90°, while the barriers at torsions of 0° or 180° are too large to generate detectable splittings. The tunnelling barrier has been determined as 248 cm-1, similar to the value obtained with high-level MP2 ab initio calculations (259 cm-1), but smaller than in benzyl alcohol (280 cm-1).
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Affiliation(s)
- Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de Ciencias , Universidad de Valladolid , Paseo de Belén, 7 , E-47011 , Valladolid , Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de Ciencias , Universidad de Valladolid , Paseo de Belén, 7 , E-47011 , Valladolid , Spain
| | - Walther Caminati
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de Ciencias , Universidad de Valladolid , Paseo de Belén, 7 , E-47011 , Valladolid , Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de Ciencias , Universidad de Valladolid , Paseo de Belén, 7 , E-47011 , Valladolid , Spain
| | - Lourdes Enríquez
- Departamento de Electrónica, ETSIT , Universidad de Valladolid , Paseo de Belén, 11 , E-47011 , Valladolid , Spain
| | - Martín Jaraíz
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de Ciencias , Universidad de Valladolid , Paseo de Belén, 7 , E-47011 , Valladolid , Spain.,Departamento de Electrónica, ETSIT , Universidad de Valladolid , Paseo de Belén, 11 , E-47011 , Valladolid , Spain
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Juanes M, Saragi RT, Caminati W, Lesarri A. Frontispiece: The Hydrogen Bond and Beyond: Perspectives for Rotational Investigations of Non‐Covalent Interactions. Chemistry 2019. [DOI: 10.1002/chem.201984961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
| | - Rizalina T. Saragi
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
| | - Walther Caminati
- Dipartimento di Chimica “G. Ciamician”Università di Bologna Via Selmi 2 40126 Bologna Italy
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
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Juanes M, Saragi RT, Caminati W, Lesarri A. The Hydrogen Bond and Beyond: Perspectives for Rotational Investigations of Non‐Covalent Interactions. Chemistry 2019; 25:11402-11411. [DOI: 10.1002/chem.201901113] [Citation(s) in RCA: 63] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2019] [Revised: 04/15/2019] [Indexed: 12/22/2022]
Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
| | - Rizalina T. Saragi
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
| | - Walther Caminati
- Dipartimento di Chimica “G. Ciamician”Università di Bologna Via Selmi 2 40126 Bologna Italy
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica—IU CINQUIMAFacultad de CienciasUniversidad de Valladolid 47011 Valladolid Spain
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Calabrese C, Écija P, Compañón I, Vallejo-López M, Cimas Á, Parra M, Basterretxea FJ, Santos JI, Jiménez-Barbero J, Lesarri A, Corzana F, Cocinero EJ. Conformational Behavior of d-Lyxose in Gas and Solution Phases by Rotational and NMR Spectroscopies. J Phys Chem Lett 2019; 10:3339-3345. [PMID: 31141365 DOI: 10.1021/acs.jpclett.9b00978] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Understanding the conformational preferences of carbohydrates is crucial to explain the interactions with their biological targets and to improve their use as therapeutic agents. We present experimental data resolving the conformational landscape of the monosaccharide d-lyxose, for which quantum mechanical (QM) calculations offer model-dependent results. This study compares the structural preferences in the gas phase, determined by rotational spectroscopy, with those in solution, resolved by nuclear magnetic resonance (NMR) and molecular dynamics (MD) simulations. In contrast to QM calculations, d-lyxose adopts only pyranose forms in the gas phase, with the α-anomer exhibiting both the 4C1 and 1C4 chairs (60:40). The predominantly populated β-anomer shows the 4C1 form exclusively, as determined experimentally by isotopic substitution. In aqueous solution, the pyranose forms are also dominant. However, in contrast to the gas phase, the α-anomer as 1C4 chair is the most populated, and its solvation is more effective than for the β derivative. Markedly, the main conformers found in the gas phase and solution are characterized by the lack of the stabilizing anomeric effect. From a mechanistic perspective, both rotational spectroscopy and solid-state nuclear magnetic resonance (NMR) corroborate that α ↔ β or furanose ↔ pyranose interconversions are prevented in the gas phase. Combining microwave (MW) and NMR results provides a powerful method for unraveling the water role in the conformational preferences of challenging molecules, such as flexible monosaccharides.
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Affiliation(s)
- Camilla Calabrese
- Departamento de Química Física, Facultad de Ciencia y Tecnología , Universidad del País Vasco (UPV/EHU) , 48080 Bilbao , Spain
- Instituto Biofisika (CSIC, UPV/EHU) , 48080 Bilbao , Spain
| | - Patricia Écija
- Departamento de Química Física, Facultad de Ciencia y Tecnología , Universidad del País Vasco (UPV/EHU) , 48080 Bilbao , Spain
| | - Ismael Compañón
- Departamento de Química, Centro de Investigación en Síntesis Química , Universidad de La Rioja , 26006 Logroño , Spain
| | - Montserrat Vallejo-López
- Departamento de Química Física, Facultad de Ciencia y Tecnología , Universidad del País Vasco (UPV/EHU) , 48080 Bilbao , Spain
| | - Álvaro Cimas
- Laboratoire Analyse et Modélisation pour la Biologie et l'Environnement, LAMBE UMR8587 , Université d'Évry val d'Essonne , 91025 Évry , France
| | - Maider Parra
- Departamento de Química Física, Facultad de Ciencia y Tecnología , Universidad del País Vasco (UPV/EHU) , 48080 Bilbao , Spain
- Instituto Biofisika (CSIC, UPV/EHU) , 48080 Bilbao , Spain
| | - Francisco J Basterretxea
- Departamento de Química Física, Facultad de Ciencia y Tecnología , Universidad del País Vasco (UPV/EHU) , 48080 Bilbao , Spain
| | - José I Santos
- SGIker UPV/EHU , Centro Joxe Mari Korta , Tolosa Hiribidea 72 , 20018 Donostia , Spain
| | - Jesús Jiménez-Barbero
- Departamento de Química Orgánica II, Facultad de Ciencia y Tecnología , Universidad del País Vasco (UPV/EHU) , 48080 Bilbao , Spain
- IKERBASQUE, Basque Foundation for Science , 48009 Bilbao , Spain
- Chemical Glycobiology Laboratory, CIC bioGUNE , Bizkaia Technology Park , Building 800, 48160 Derio , Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica-IU CINQUIMA, Facultad de Ciencias , Universidad de Valladolid , 47011 Valladolid , Spain
| | - Francisco Corzana
- Departamento de Química, Centro de Investigación en Síntesis Química , Universidad de La Rioja , 26006 Logroño , Spain
| | - Emilio J Cocinero
- Departamento de Química Física, Facultad de Ciencia y Tecnología , Universidad del País Vasco (UPV/EHU) , 48080 Bilbao , Spain
- Instituto Biofisika (CSIC, UPV/EHU) , 48080 Bilbao , Spain
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Jaraíz M, Rubio JE, Enríquez L, Pinacho R, López-Pérez JL, Lesarri A. An Efficient Microkinetic Modeling Protocol: Start with Only the Dominant Mechanisms, Adjust All Parameters, and Build the Complete Model Incrementally. ACS Catal 2019. [DOI: 10.1021/acscatal.9b00522] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Martín Jaraíz
- Department of Electronics, ETSIT, University of Valladolid, Paseo de Belén 15, Valladolid 47011, Spain
- IU CINQUIMA, University of Valladolid, Paseo de Belén 7, 47011 Valladolid, Spain
| | - José E. Rubio
- Department of Electronics, ETSIT, University of Valladolid, Paseo de Belén 15, Valladolid 47011, Spain
| | - Lourdes Enríquez
- Department of Electronics, ETSIT, University of Valladolid, Paseo de Belén 15, Valladolid 47011, Spain
| | - Ruth Pinacho
- Department of Electronics, ETSIT, University of Valladolid, Paseo de Belén 15, Valladolid 47011, Spain
| | - José L. López-Pérez
- Department of Pharmacology, Faculty of Medicine, University of Panama, Panama City, Panama
- Department of Pharmaceutical Sciences - IBSAL-CIETUS, University of Salamanca, Avda. Campo
Charro s/n, Salamanca 37071, Spain
| | - Alberto Lesarri
- Department of Physical Chemistry and Inorganic Chemistry, Faculty of Sciences, University of Valladolid, Paseo Belén 7, Valladolid 47011, Spain
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32
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León I, Lesarri A, Fernández JA. Evaluation of the aggregation process in a mixture of propofol and benzocaine. Phys Chem Chem Phys 2019; 21:3537-3544. [PMID: 30137107 DOI: 10.1039/c8cp04386h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report on a mass-resolved IR spectrosopic study on propofol-benzocaine aggregates. This is a complex system due to the several conformational isomers that both monomers may adopt and to the combination of functional groups they present, which allow the molecules to interact in many possible ways. However, our results demonstrate that a single conformation is favored for each stoichiometry. In the heterodimer, propofol acts as a proton donor to the ester group of benzocaine, while the whole cluster is stabilized by dispersive forces. These dispersive forces account for an important part of the system's stabilization energy as the calculations suggest. Propofol does not show any affinity for the amino group of benzocaine, even when a second molecule of propofol is introduced. These results demonstrate the difficulty in anticipating the aggregation preferences of even small organic molecules.
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Affiliation(s)
- I León
- Department of Physical Chemistry, Faculty of Science and Technology, University of the Basque Country, Barrio Sarriena s/n, 48940 Leioa, Spain.
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Demaison J, Vogt N, Saragi RT, Juanes M, Rudolph HD, Lesarri A. Cover Feature: The S−S Bridge: A Mixed Experimental‐Computational Estimation of the Equilibrium Structure of Diphenyl Disulfide (ChemPhysChem 3/2019). Chemphyschem 2019. [DOI: 10.1002/cphc.201900056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Jean Demaison
- Section of Chemical Information SystemsUniversity of Ulm 89069 Ulm Germany
| | - Natalja Vogt
- Section of Chemical Information SystemsUniversity of Ulm 89069 Ulm Germany
- Department of ChemistryLomonosov Moscow State University 119992 Moscow Russia
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de CienciasUniversidad de Valladolid, Paseo de Belén, 7 47011 Valladolid Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de CienciasUniversidad de Valladolid, Paseo de Belén, 7 47011 Valladolid Spain
| | | | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de CienciasUniversidad de Valladolid, Paseo de Belén, 7 47011 Valladolid Spain
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Demaison J, Vogt N, Saragi RT, Juanes M, Rudolph HD, Lesarri A. How flexible is the disulfide linker? A combined rotational–computational investigation of diallyl disulfide. Phys Chem Chem Phys 2019; 21:19732-19736. [PMID: 31192318 DOI: 10.1039/c9cp02508a] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The symmetrically substituted diallyl disulfide adopts an asymmetric conformation in the gas phase, as observed in the rotational spectrum.
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Affiliation(s)
- Jean Demaison
- Section of Chemical Information Systems
- University of Ulm
- 89069 Ulm
- Germany
| | - Natalja Vogt
- Section of Chemical Information Systems
- University of Ulm
- 89069 Ulm
- Germany
- Department of Chemistry
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica – IU CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid
- 47011 Valladolid
- Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica – IU CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid
- 47011 Valladolid
- Spain
| | | | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica – IU CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid
- 47011 Valladolid
- Spain
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35
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Juanes M, Li W, Spada L, Evangelisti L, Lesarri A, Caminati W. Internal dynamics of cyclohexanol and the cyclohexanol–water adduct. Phys Chem Chem Phys 2019; 21:3676-3682. [DOI: 10.1039/c8cp04455d] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Two for a tango: the rotational spectrum of a cyclohexanol–water dimer evidences a concerted motion of the water molecule and the hydroxyl group of the ring.
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Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica – IU CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid
- E-47011 Valladolid
- Spain
| | - Weixing Li
- Dipartimento di Chimica “Giacomo Ciamician” dell’Università
- I-40126 Bologna
- Italy
| | - Lorenzo Spada
- Dipartimento di Chimica “Giacomo Ciamician” dell’Università
- I-40126 Bologna
- Italy
| | - Luca Evangelisti
- Dipartimento di Chimica “Giacomo Ciamician” dell’Università
- I-40126 Bologna
- Italy
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica – IU CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid
- E-47011 Valladolid
- Spain
| | - Walther Caminati
- Dipartimento di Chimica “Giacomo Ciamician” dell’Università
- I-40126 Bologna
- Italy
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36
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Saragi RT, Juanes M, Abad JL, Lesarri A, Pinacho R, Rubio JE. Rotational spectroscopy of organophosphorous chemical agents: cresyl and phenyl saligenin phosphates. Phys Chem Chem Phys 2019; 21:16418-16422. [DOI: 10.1039/c9cp03093j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Cresyl and phenyl saligenin phosphate have been probed in a jet expansion by broadband chirp-excitation microwave spectroscopy, revealing the most stable confirmations and their structural properties.
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Affiliation(s)
- Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica – IU CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid
- 47011 Valladolid
- Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica – IU CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid
- 47011 Valladolid
- Spain
| | - José Luis Abad
- Departamento de Química Biológica
- Instituto de Química Avanzada de Cataluña (IQAC-CSIC)
- Consejo Superior de Investigaciones Científicas (CSIC)
- 08034 Barcelona
- Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica – IU CINQUIMA
- Facultad de Ciencias
- Universidad de Valladolid
- 47011 Valladolid
- Spain
| | - Ruth Pinacho
- Departamento de Electrónica
- ETSIT
- Universidad de Valladolid
- 47011 Valladolid
- Spain
| | - José Emiliano Rubio
- Departamento de Electrónica
- ETSIT
- Universidad de Valladolid
- 47011 Valladolid
- Spain
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37
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Demaison J, Vogt N, Saragi RT, Juanes M, Rudolph HD, Lesarri A. The S−S Bridge: A Mixed Experimental‐Computational Estimation of the Equilibrium Structure of Diphenyl Disulfide. Chemphyschem 2018; 20:366-373. [DOI: 10.1002/cphc.201800973] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2018] [Revised: 11/26/2018] [Indexed: 11/06/2022]
Affiliation(s)
- Jean Demaison
- Section of Chemical Information SystemsUniversity of Ulm 89069 Ulm Germany
| | - Natalja Vogt
- Section of Chemical Information SystemsUniversity of Ulm 89069 Ulm Germany
- Department of ChemistryLomonosov Moscow State University 119992 Moscow Russia
| | - Rizalina Tama Saragi
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de CienciasUniversidad de Valladolid, Paseo de Belén, 7 47011 Valladolid Spain
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de CienciasUniversidad de Valladolid, Paseo de Belén, 7 47011 Valladolid Spain
| | | | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica - IU CINQUIMA, Facultad de CienciasUniversidad de Valladolid, Paseo de Belén, 7 47011 Valladolid Spain
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38
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Pérez C, León I, Lesarri A, Pate BH, Martínez R, Millán J, Fernández JA. Isomerism of the Aniline Trimer. Angew Chem Int Ed Engl 2018; 57:15112-15116. [DOI: 10.1002/anie.201808602] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2018] [Revised: 09/17/2018] [Indexed: 01/09/2023]
Affiliation(s)
- Cristóbal Pérez
- Deutsches Elektronen-Synchrotron DESY Notkestrasse 85 22607 Hamburg Germany
- Departamento de Química FísicaUniversidad del País Vasco 48940 Leioa Spain
- Ikerbasque, Basque Foundation for Science 48013 Bilbao Spain
| | - Iker León
- Departamento de Química Física y QuímicaInorgánica, Universidad de Valladolid 47011 Valladolid Spain
| | - Alberto Lesarri
- Departamento de Química Física y QuímicaInorgánica, Universidad de Valladolid 47011 Valladolid Spain
| | - Brooks H. Pate
- Department of ChemistryUniversity of Virginia McCormick Rd. Charlottesville VA 22904 USA
| | - Rodrigo Martínez
- Departamento de QuímicaUniversidad de La Rioja 26006 Logroño Spain
| | - Judith Millán
- Departamento de QuímicaUniversidad de La Rioja 26006 Logroño Spain
| | - José A. Fernández
- Departamento de Química FísicaUniversidad del País Vasco 48080 Bilbao Spain
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Affiliation(s)
- Cristóbal Pérez
- Deutsches Elektronen-Synchrotron DESY Notkestrasse 85 22607 Hamburg Germany
- Departamento de Química FísicaUniversidad del País Vasco 48940 Leioa Spain
- Ikerbasque, Basque Foundation for Science 48013 Bilbao Spain
| | - Iker León
- Departamento de Química Física y QuímicaInorgánica, Universidad de Valladolid 47011 Valladolid Spain
| | - Alberto Lesarri
- Departamento de Química Física y QuímicaInorgánica, Universidad de Valladolid 47011 Valladolid Spain
| | - Brooks H. Pate
- Department of ChemistryUniversity of Virginia McCormick Rd. Charlottesville VA 22904 USA
| | - Rodrigo Martínez
- Departamento de QuímicaUniversidad de La Rioja 26006 Logroño Spain
| | - Judith Millán
- Departamento de QuímicaUniversidad de La Rioja 26006 Logroño Spain
| | - José A. Fernández
- Departamento de Química FísicaUniversidad del País Vasco 48080 Bilbao Spain
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40
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León I, Usabiaga I, Arnaiz PF, Lesarri A, Fernández JA. Frontispiece: Stepwise Nucleation of Aniline: Emergence of Spectroscopic Fingerprints of the Liquid Phase. Chemistry 2018. [DOI: 10.1002/chem.201884163] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Iker León
- Department Of Physical Chemistryt; University of the Basque Country (UPV/EHU); Barrio Sarriena, S/N 48940 Leioa Spain
- Present address: Grupo de Espectrocopía Molecular; Edificio Quifima; Laboratorios de Espectroscopia y Bioespectroscopia Unidad Asociada CSIC; Parque Científico UVa; Universidad de Valladolid; 47011 Valladolid Spain
| | - Imanol Usabiaga
- Department Of Physical Chemistryt; University of the Basque Country (UPV/EHU); Barrio Sarriena, S/N 48940 Leioa Spain
- Present address: Dipartimento di Chimica “Giacomo Ciamician”; Università degli Studi di Bologna; via Selmi 2 I-40126 Bologna Italy
| | - Pedro F. Arnaiz
- Department Of Physical Chemistryt; University of the Basque Country (UPV/EHU); Barrio Sarriena, S/N 48940 Leioa Spain
| | - Alberto Lesarri
- Department of Physical Chemistry and Inorganic Chemistry; University of Valladolid; 47005 Valladolid Spain
| | - José A. Fernández
- Department Of Physical Chemistryt; University of the Basque Country (UPV/EHU); Barrio Sarriena, S/N 48940 Leioa Spain
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41
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León I, Usabiaga I, Arnaiz PF, Lesarri A, Fernández JA. Stepwise Nucleation of Aniline: Emergence of Spectroscopic Fingerprints of the Liquid Phase. Chemistry 2018; 24:10291-10295. [DOI: 10.1002/chem.201802015] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 05/30/2018] [Indexed: 11/12/2022]
Affiliation(s)
- Iker León
- Department Of Physical Chemistryt; University of the Basque Country (UPV/EHU); Barrio Sarriena, S/N 48940 Leioa Spain
- Present address: Grupo de Espectrocopía Molecular; Edificio Quifima; Laboratorios de Espectroscopia y Bioespectroscopia Unidad Asociada CSIC; Parque Científico UVa; Universidad de Valladolid; 47011 Valladolid Spain
| | - Imanol Usabiaga
- Department Of Physical Chemistryt; University of the Basque Country (UPV/EHU); Barrio Sarriena, S/N 48940 Leioa Spain
- Present address: Dipartimento di Chimica “Giacomo Ciamician”; Università degli Studi di Bologna; via Selmi 2 I-40126 Bologna Italy
| | - Pedro F. Arnaiz
- Department Of Physical Chemistryt; University of the Basque Country (UPV/EHU); Barrio Sarriena, S/N 48940 Leioa Spain
| | - Alberto Lesarri
- Department of Physical Chemistry and Inorganic Chemistry; University of Valladolid; 47005 Valladolid Spain
| | - José A. Fernández
- Department Of Physical Chemistryt; University of the Basque Country (UPV/EHU); Barrio Sarriena, S/N 48940 Leioa Spain
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42
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Juanes M, Lesarri A, Pinacho R, Charro E, Rubio JE, Enríquez L, Jaraíz M. Sulfur Hydrogen Bonding in Isolated Monohydrates: Furfuryl Mercaptan versus Furfuryl Alcohol. Chemistry 2018; 24:6564-6571. [DOI: 10.1002/chem.201705727] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias; Universidad de Valladolid; 47011 Valladolid Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias; Universidad de Valladolid; 47011 Valladolid Spain
| | - Ruth Pinacho
- Departamento de Electrónica, ETSIT; Universidad de Valladolid; 47011 Valladolid Spain
| | - Elena Charro
- Departamento de Didáctica CCEESSM, Facultad de Educación y Trabajo Social; Universidad de Valladolid; 47011 Valladolid Spain
| | - José E. Rubio
- Departamento de Electrónica, ETSIT; Universidad de Valladolid; 47011 Valladolid Spain
| | - Lourdes Enríquez
- Departamento de Electrónica, ETSIT; Universidad de Valladolid; 47011 Valladolid Spain
| | - Martín Jaraíz
- Departamento de Electrónica, ETSIT; Universidad de Valladolid; 47011 Valladolid Spain
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43
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Vogt N, Demaison J, Rudolph HD, Juanes M, Fernández J, Lesarri A. Semiexperimental and mass-dependent structures by the mixed regression method: Accurate equilibrium structure and failure of the Kraitchman method for ethynylcyclohexane. J Chem Phys 2018; 148:064306. [DOI: 10.1063/1.5018053] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Natalja Vogt
- Section of Chemical Information Systems, University of Ulm, Albert-Einstein-Allee 47, 89081 Ulm, Germany
- Department of Chemistry, Lomonosov Moscow State University, 119991 Moscow, Russia
| | - Jean Demaison
- Section of Chemical Information Systems, University of Ulm, Albert-Einstein-Allee 47, 89081 Ulm, Germany
| | - Heinz Dieter Rudolph
- Section of Chemical Information Systems, University of Ulm, Albert-Einstein-Allee 47, 89081 Ulm, Germany
| | - Marcos Juanes
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Jairo Fernández
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, Paseo de Belén, 7, 47011 Valladolid, Spain
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Vallejo-López M, Écija P, Vogt N, Demaison J, Lesarri A, Basterretxea FJ, Cocinero EJ. N-Methyl Inversion and Accurate Equilibrium Structures in Alkaloids: Pseudopelletierine. Chemistry 2017; 23:16491-16496. [PMID: 28759141 DOI: 10.1002/chem.201702232] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Indexed: 11/06/2022]
Abstract
A rotational spectroscopy investigation has resolved the conformational equilibrium and structural properties of the alkaloid pseudopelletierine. Two different conformers, which originate from inversion of the N-methyl group from an axial to an equatorial position, have been unambiguously identified in the gas phase, and nine independent isotopologues have been recorded by Fourier-transform microwave spectroscopy in a jet expansion. Both conformers share a chair-chair configuration of the two bridged six-membered rings. The conformational equilibrium is displaced towards the axial form, with a relative population in the supersonic jet of Naxial /Nequatorial ≈2/1. An accurate equilibrium structure has been determined by using the semiexperimental mixed-estimation method and alternatively computed by quantum-chemical methods up to the coupled-cluster level of theory. A comparison with the N-methyl inversion equilibria in related tropanes is also presented.
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Affiliation(s)
- Montserrat Vallejo-López
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain
| | - Patricia Écija
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain
| | - Natalja Vogt
- Chemical Information Systems, Faculty of Sciences, University of Ulm, 89069, Ulm, Germany
| | - Jean Demaison
- Chemical Information Systems, Faculty of Sciences, University of Ulm, 89069, Ulm, Germany
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47011, Valladolid, Spain
| | - Francisco J Basterretxea
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain
| | - Emilio J Cocinero
- Departamento de Química Física, Facultad de Ciencia y Tecnología, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain
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Vallejo-López M, Écija P, Vogt N, Demaison J, Lesarri A, Basterretxea FJ, Cocinero EJ. Front Cover: N
-Methyl Inversion and Accurate Equilibrium Structures in Alkaloids: Pseudopelletierine (Chem. Eur. J. 65/2017). Chemistry 2017. [DOI: 10.1002/chem.201704113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Montserrat Vallejo-López
- Departamento de Química Física; Facultad de Ciencia y Tecnología; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
| | - Patricia Écija
- Departamento de Química Física; Facultad de Ciencia y Tecnología; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
| | - Natalja Vogt
- Chemical Information Systems; Faculty of Sciences; University of Ulm; 89069 Ulm Germany
| | - Jean Demaison
- Chemical Information Systems; Faculty of Sciences; University of Ulm; 89069 Ulm Germany
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica; Facultad de Ciencias; Universidad de Valladolid; 47011 Valladolid Spain
| | - Francisco J. Basterretxea
- Departamento de Química Física; Facultad de Ciencia y Tecnología; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
| | - Emilio J. Cocinero
- Departamento de Química Física; Facultad de Ciencia y Tecnología; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
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46
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Wachsmuth D, Jahn MK, Blanco S, Gigosos MA, Lesarri A, Grabow JU. Inversion of Bicyclic Decanes: Rotational Spectra of the Trans
and Double Cis
Conformations of 2-Decalone. Chemphyschem 2017; 18:3620-3624. [DOI: 10.1002/cphc.201700848] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Revised: 09/08/2017] [Indexed: 11/09/2022]
Affiliation(s)
- Dennis Wachsmuth
- Institut für Physikalische Chemie & Elektrochemie, Lehrgebiet A; Gottfried-Wilhelm-Leibniz-Universität; Callinstrasse 3A, D- 30167 Hannover Germany
| | - Michaela K. Jahn
- Institut für Physikalische Chemie & Elektrochemie, Lehrgebiet A; Gottfried-Wilhelm-Leibniz-Universität; Callinstrasse 3A, D- 30167 Hannover Germany
| | - Susana Blanco
- Departamento de Química Física y Química Inorgánica; Universidad de Valladolid; Paseo de Belén, 7 47011 Valladolid Spain
| | - Marco A. Gigosos
- Departamento de Física Teórica, Atómica y Óptica; Universidad de Valladolid; Paseo de Belén, 7 47011 Valladolid Spain
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica; Universidad de Valladolid; Paseo de Belén, 7 47011 Valladolid Spain
| | - Jens-Uwe Grabow
- Institut für Physikalische Chemie & Elektrochemie, Lehrgebiet A; Gottfried-Wilhelm-Leibniz-Universität; Callinstrasse 3A, D- 30167 Hannover Germany
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Vallejo-López M, Écija P, Vogt N, Demaison J, Lesarri A, Basterretxea FJ, Cocinero EJ. N
-Methyl Inversion and Accurate Equilibrium Structures in Alkaloids: Pseudopelletierine. Chemistry 2017. [DOI: 10.1002/chem.201704114] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Montserrat Vallejo-López
- Departamento de Química Física; Facultad de Ciencia y Tecnología; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
| | - Patricia Écija
- Departamento de Química Física; Facultad de Ciencia y Tecnología; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
| | - Natalja Vogt
- Chemical Information Systems; Faculty of Sciences; University of Ulm; 89069 Ulm Germany
| | - Jean Demaison
- Chemical Information Systems; Faculty of Sciences; University of Ulm; 89069 Ulm Germany
| | - Alberto Lesarri
- Departamento de Química Física y Química Inorgánica; Facultad de Ciencias; Universidad de Valladolid; 47011 Valladolid Spain
| | - Francisco J. Basterretxea
- Departamento de Química Física; Facultad de Ciencia y Tecnología; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
| | - Emilio J. Cocinero
- Departamento de Química Física; Facultad de Ciencia y Tecnología; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
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48
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Lesarri A, Pinacho R, Enríquez L, Rubio JE, Jaraíz M, Abad JL, Gigosos MA. Rotational spectra of tetracyclic quinolizidine alkaloids: does a water molecule flip sparteine? Phys Chem Chem Phys 2017; 19:17553-17559. [PMID: 28474045 DOI: 10.1039/c7cp01432e] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Sparteine is a quinolizidine alkaloid used as a chiral auxiliary in asymmetric synthesis. We examine whether hydration by a single molecule can flip sparteine from the most stable trans conformation to the bidentate cis arrangement observed in catalytic complexation to a metal center. Sparteine and the sparteine-water dimer were generated in a supersonic jet expansion with H216O and H218O, and characterized by broadband chirped-pulse microwave spectroscopy. Even though the bidentate water dimer was predicted with larger binding energy, a single isomer was observed for the monohydrated cluster, with sparteine retaining the trans conformation observed for the free molecule. The absence of the bidentate dimer is attributed to the kinetic control of cluster formation, favoring the pre-expansion most abundant monomer. The structural properties of the O-HN hydrogen bond in the dimer are compared with those of complexes of other secondary and tertiary amines.
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Affiliation(s)
- Alberto Lesarri
- Departamento de Química Física y Química Inorgánica, Facultad de Ciencias, Universidad de Valladolid, 47011 Valladolid, Spain.
| | - Ruth Pinacho
- Departamento de Electrónica, Escuela de Ingeniería de Telecomunicaciones, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Lourdes Enríquez
- Departamento de Electrónica, Escuela de Ingeniería de Telecomunicaciones, Universidad de Valladolid, 47011 Valladolid, Spain
| | - José E Rubio
- Departamento de Electrónica, Escuela de Ingeniería de Telecomunicaciones, Universidad de Valladolid, 47011 Valladolid, Spain
| | - Martín Jaraíz
- Departamento de Electrónica, Escuela de Ingeniería de Telecomunicaciones, Universidad de Valladolid, 47011 Valladolid, Spain
| | - José L Abad
- Spanish National Research Council (CSIC), Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Research Unit on Bioactive Molecules (RUBAM), Department of Biomedicinal Chemistry, 08034 Barcelona, Spain
| | - Marco A Gigosos
- Departamento de Física Teórica, Atómica y Óptica, Facultad de Ciencias, Universidad de Valladolid, 47011 Valladolid, Spain
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49
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Uriarte I, Pérez C, Caballero-Mancebo E, Basterretxea FJ, Lesarri A, Fernández JA, Cocinero EJ. Cover Picture: Structural Studies of Nicotinoids: Cotinine versus Nicotine (Chem. Eur. J. 30/2017). Chemistry 2017. [DOI: 10.1002/chem.201701075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Iciar Uriarte
- Departamento Química Física; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
| | - Cristóbal Pérez
- Max Planck Institute for the Structure and Dynamics of Matter; Luruper Chaussee 149 22761 Hamburg Germany
| | - Elena Caballero-Mancebo
- Departamento Química Física y Química Inorgánica; Universidad de Valladolid; Paseo de Belén 7 47011 Valladolid Spain
| | | | - Alberto Lesarri
- Departamento Química Física y Química Inorgánica; Universidad de Valladolid; Paseo de Belén 7 47011 Valladolid Spain
| | - José A. Fernández
- Departamento Química Física; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
| | - Emilio J. Cocinero
- Departamento Química Física; Universidad del País Vasco (UPV/EHU); Apartado 644 48080 Bilbao Spain
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50
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Uriarte I, Pérez C, Caballero-Mancebo E, Basterretxea FJ, Lesarri A, Fernández JA, Cocinero EJ. Structural Studies of Nicotinoids: Cotinine versus Nicotine. Chemistry 2017; 23:7238-7244. [PMID: 28212459 DOI: 10.1002/chem.201700023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Indexed: 01/28/2023]
Abstract
Nicotinoids are agonists of the acetylcholine receptor (nAChR) and play important biochemical and pharmacological roles. Herein, we report on the structure and conformation of cotinine, and compare its molecular properties with the nicotine prototype, from which it only differs in the addition of a carbonyl group. This investigation included a theoretical survey of the effects of rotamerization of the pyridine moiety, the puckering of the pyrrolidinone ring and the internal rotation of the methyl group. The experimental work examined the rotational spectrum of the molecule in a supersonic expansion, using both broadband chirped-pulse excitation techniques and cavity microwave spectrometers. Two conformers were observed for cotinine, and the fine and hyperfine structures arising from the two quadrupolar 14 N nuclei and the methyl internal rotor were fully analyzed. The two observed conformers share the same twisted conformation of the five-membered ring, but differ in a roughly 180° rotamerization around the C-C bond connecting the two rings. The energy barriers for the internal rotation of the methyl group in cotinine (4.55(4) and 4.64(3) kJ mol-1 , respectively) are much lower than in nicotine (estimated in 16.5 kJ mol-1 ). The combination of different intramolecular electronic effects, hydrogen bonding and possible binding differences to receptor molecules arising from the carbonyl group could explain the lower affinity of cotinine for nAChRs.
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Affiliation(s)
- Iciar Uriarte
- Departamento Química Física, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain
| | - Cristóbal Pérez
- Max Planck Institute for the Structure and Dynamics of Matter, Luruper Chaussee 149, 22761, Hamburg, Germany
| | - Elena Caballero-Mancebo
- Departamento Química Física y Química Inorgánica, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
| | - Francisco J Basterretxea
- Departamento Química Física, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain
| | - Alberto Lesarri
- Departamento Química Física y Química Inorgánica, Universidad de Valladolid, Paseo de Belén 7, 47011, Valladolid, Spain
| | - José A Fernández
- Departamento Química Física, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain
| | - Emilio J Cocinero
- Departamento Química Física, Universidad del País Vasco (UPV/EHU), Apartado 644, 48080, Bilbao, Spain
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