1
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Rummel L, Schreiner PR. Advances and Prospects in Understanding London Dispersion Interactions in Molecular Chemistry. Angew Chem Int Ed Engl 2024; 63:e202316364. [PMID: 38051426 DOI: 10.1002/anie.202316364] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 12/03/2023] [Accepted: 12/05/2023] [Indexed: 12/07/2023]
Abstract
London dispersion (LD) interactions are the main contribution of the attractive part of the van der Waals potential. Even though LD effects are the driving force for molecular aggregation and recognition, the role of these omnipresent interactions in structure and reactivity had been largely underappreciated over decades. However, in the recent years considerable efforts have been made to thoroughly study LD interactions and their potential as a chemical design element for structures and catalysis. This was made possible through a fruitful interplay of theory and experiment. This review highlights recent results and advances in utilizing LD interactions as a structural motif to understand and utilize intra- and intermolecularly LD-stabilized systems. Additionally, we focus on the quantification of LD interactions and their fundamental role in chemical reactions.
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Affiliation(s)
- Lars Rummel
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
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2
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Milovanović MR, Zarić SD. New Aspects of Alcohol-Alcohol and Alcohol-Water Interactions: Crystallographic and Quantum Chemical Studies of Antiparallel O-H/O-H Interactions. J Phys Chem Lett 2024; 15:1294-1304. [PMID: 38284997 DOI: 10.1021/acs.jpclett.3c03399] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024]
Abstract
New modes of interaction, antiparallel O-H/O-H interactions of alcohol-alcohol dimers and alcohol-water dimers, were studied by analyzing data in the Cambridge Structural Database (CSD) and by calculating potential energy surfaces at a very accurate quantum chemical CCSD(T)/CBS level. The data reveal the existence of antiparallel interactions in crystal structures and significant interaction energies. Data from the CSD for alcohol-alcohol dimers show 49.2% of contacts with classical hydrogen bonds and 10.1% of contacts with antiparallel interactions, while for alcohol-water dimers, 59.4% of contacts are classical hydrogen bonds and only 0.6% of contacts are antiparallel interactions. The calculations were performed on methanol, ethanol, and n-propanol dimers. Classical hydrogen-bonded alcohol-alcohol and alcohol-water dimers have interaction energies of up to -6.2 kcal/mol and up to -5.5 kcal/mol, respectively. Antiparallel interactions in alcohol-alcohol and alcohol-water dimers have interaction energies of up to -4.7 kcal/mol and up to -4.4 kcal/mol, respectively. Symmetry-adapted perturbation theory analysis for antiparallel interactions shows their electrostatic nature.
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Affiliation(s)
- Milan R Milovanović
- Innovative Centre of the Faculty of Chemistry, Studentski trg 12-16, Belgrade 11000, Serbia
| | - Snežana D Zarić
- Faculty of Chemistry, University of Belgrade, Studentski trg 12-16, Belgrade 11000, Serbia
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3
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Alić J, Messner R, Alešković M, Küstner F, Rubčić M, Lackner F, Ernst WE, Šekutor M. Diamondoid ether clusters in helium nanodroplets. Phys Chem Chem Phys 2023; 25:11951-11958. [PMID: 36942672 PMCID: PMC10155488 DOI: 10.1039/d3cp00489a] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/17/2023]
Abstract
Diamondoid ethers were introduced into superfluid helium nanodroplets and the resulting clusters were analyzed by time-of-flight mass spectrometry. Clusters of higher abundances (magic number clusters) were identified and the corresponding potential cluster geometries were obtained from GFN2-xTB and DFT computations. We found that the studied diamondoid ethers readily self-assemble in helium nanodroplets and that London dispersion attraction between hydrocarbon subunits acts as a driving force for cluster formation. On the other hand, hydrogen bonding between ether oxygens and trace water molecules fosters the eventual breakdown of the initial supramolecular aggregate.
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Affiliation(s)
- Jasna Alić
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10 000 Zagreb, Croatia.
| | - Roman Messner
- Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria.
| | - Marija Alešković
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10 000 Zagreb, Croatia.
| | - Florian Küstner
- Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria.
| | - Mirta Rubčić
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10 000 Zagreb, Croatia
| | - Florian Lackner
- Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria.
| | - Wolfgang E Ernst
- Institute of Experimental Physics, Graz University of Technology, Petersgasse 16, 8010 Graz, Austria.
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička cesta 54, 10 000 Zagreb, Croatia.
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4
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Ghosh S, Changotra A, Petrone DA, Isomura M, Carreira EM, Sunoj RB. Role of Noncovalent Interactions in Inducing High Enantioselectivity in an Alcohol Reductive Deoxygenation Reaction Involving a Planar Carbocationic Intermediate. J Am Chem Soc 2023; 145:2884-2900. [PMID: 36695526 DOI: 10.1021/jacs.2c10975] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The involvement of planar carbocation intermediates is generally considered undesirable in asymmetric catalysis due to the difficulty in gaining facial control and their intrinsic stability issues. Recently, suitably designed chiral catalyst(s) have enabled a guided approach of nucleophiles to one of the prochiral faces of carbocations affording high enantiocontrol. Herein, we present the vital mechanistic insights from our comprehensive density functional theory (B3LYP-D3) study on a chiral Ir-phosphoramidite-catalyzed asymmetric reductive deoxygenation of racemic tertiary α-substituted allenylic alcohols. The catalytic transformation relies on the synergistic action of a phosphoramidite-modified Ir catalyst and Bi(OTf)3, first leading to the formation of an Ir-π-allenyl carbocation intermediate through a turn-over-determining SN1 ionization, followed by a face-selective hydride transfer from a Hantzsch ester analogue to yield an enantioenriched product. Bi(OTf)3 was found to promote a significant number of ionic interactions as well as noncovalent interactions (NCIs) with the catalyst and the substrates (allenylic alcohol and Hantzsch ester), thus providing access to a lower energy route as compared to the pathways devoid of Bi(OTf)3. In the nucleophilic addition, the chiral induction was found to depend on the number and efficacy of such key NCIs. The curious case of reversal of enantioselectivity, when the α-substituent of the allenyl alcohol is changed from methyl to cyclopropyl, was identified to originate from a change in mechanism from an enantioconvergent pathway (α-methyl) to a dynamic kinetic asymmetric transformation (α-cyclopropyl). These molecular insights could lead to newer strategies to tame tertiary carbocations in enantioselective reactions using suitable combinations of catalysts and additives.
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Affiliation(s)
- Supratim Ghosh
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - Avtar Changotra
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
| | - David A Petrone
- Department of Chemistry and Applied Biosciences, Laboratory of Organic Chemistry, ETH Zürich, 8093 Zürich, Switzerland.,Department of Process Research & Development, Merck & Co., Inc., MRL, Rahway, New Jersey 07065, United States
| | - Mayuko Isomura
- Department of Chemistry and Applied Biosciences, Laboratory of Organic Chemistry, ETH Zürich, 8093 Zürich, Switzerland
| | - Erick M Carreira
- Department of Chemistry and Applied Biosciences, Laboratory of Organic Chemistry, ETH Zürich, 8093 Zürich, Switzerland
| | - Raghavan B Sunoj
- Department of Chemistry, Indian Institute of Technology Bombay, Powai, Mumbai 400076, India
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5
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Grimm LM, Spicher S, Tkachenko B, Schreiner PR, Grimme S, Biedermann F. The Role of Packing, Dispersion, Electrostatics, and Solvation in High-Affinity Complexes of Cucurbit[n]urils with Uncharged Polar Guests. Chemistry 2022; 28:e202200529. [PMID: 35612260 PMCID: PMC9401061 DOI: 10.1002/chem.202200529] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Indexed: 12/21/2022]
Abstract
The rationalization of non‐covalent binding trends is both of fundamental interest and provides new design concepts for biomimetic molecular systems. Cucurbit[n]urils (CBn) are known for a long time as the strongest synthetic binders for a wide range of (bio)organic compounds in water. However, their host‐guest binding mechanism remains ambiguous despite their symmetric and simple macrocyclic structure and the wealth of literature reports. We herein report experimental thermodynamic binding parameters (ΔG, ΔH, TΔS) for CB7 and CB8 with a set of hydroxylated adamantanes, di‐, and triamantanes as uncharged, rigid, and spherical/ellipsoidal guests. Binding geometries and binding energy decomposition were obtained from high‐level theory computations. This study reveals that neither London dispersion interactions, nor electronic energies or entropic factors are decisive, selectivity‐controlling factors for CBn complexes. In contrast, peculiar host‐related solvation effects were identified as the major factor for rationalizing the unique behavior and record‐affinity characteristics of cucurbit[n]urils.
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Affiliation(s)
- Laura M Grimm
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
| | - Sebastian Spicher
- Mulliken Center for Theoretical Chemistry, Institute of Physical and Theoretical Chemistry, University of Bonn, Beringstraße 4, 53115, Bonn, Germany
| | - Boryslav Tkachenko
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Stefan Grimme
- Mulliken Center for Theoretical Chemistry, Institute of Physical and Theoretical Chemistry, University of Bonn, Beringstraße 4, 53115, Bonn, Germany
| | - Frank Biedermann
- Institute of Nanotechnology, Karlsruhe Institute of Technology, Hermann-von-Helmholtz Platz 1, 76344, Eggenstein-Leopoldshafen, Germany
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6
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Alić J, Biljan I, Štefanić Z, Šekutor M. Preparation and characterization of non-aromatic ether self-assemblies on a HOPG surface. NANOTECHNOLOGY 2022; 33:355603. [PMID: 35545006 DOI: 10.1088/1361-6528/ac6e72] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2022] [Accepted: 05/11/2022] [Indexed: 06/15/2023]
Abstract
On-surface self-assemblies of aromatic organic molecules have been widely investigated, but the characterization of analogous self-assemblies consisting of fully sp3-hybridized molecules remains challenging. The possible on-surface orientations of alkyl molecules not exclusively comprised of long alkyl chains are difficult to distinguish because of their inherently low symmetry and non-planar nature. Here, we present a detailed study of diamondoid ethers, structurally rigid and fully saturated molecules, which form uniform 2D monolayers on a highly oriented pyrolytic graphite (HOPG) surface. Using scanning tunneling microscopy, various computational tools, and x-ray structural analysis, we identified the most favorable on-surface orientations of these rigid ethers and accounted for the forces driving the self-organization process. The influence of the oxygen atom and London dispersion interactions were found to be responsible for the formation of the observed highly ordered 2D ether assemblies. Our findings provide insight into the on-surface properties and behavior of non-aromatic organic compounds and broaden our understanding of the phenomena characteristic of monolayers consisting of non-planar molecules.
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Affiliation(s)
- Jasna Alić
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Ivana Biljan
- Department of Chemistry, Faculty of Science, University of Zagreb, Horvatovac 102a, 10 000 Zagreb, Croatia
| | - Zoran Štefanić
- Department of Physical Chemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
| | - Marina Šekutor
- Department of Organic Chemistry and Biochemistry, Ruđer Bošković Institute, Bijenička 54, 10 000 Zagreb, Croatia
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7
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Quesada-Moreno MM, Fatima M, Medel R, Pérez C, Schnell M. Sniffing out camphor: the fine balance between hydrogen bonding and London dispersion in the chirality recognition with α-fenchol. Phys Chem Chem Phys 2022; 24:12849-12859. [PMID: 35532923 DOI: 10.1039/d2cp00308b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Binary complexes between the chiral monoterpenoids camphor and α-fenchol were explored with vibrational and rotational jet spectroscopy as well as density functional theory in order to explore how chirality can influence the binding preferences in gas-phase complexes. The global minimum structures of the two diastereomers were assigned. It is found that chirality recognition leads to different compromises in the fine balance between intermolecular interactions. While one isomer features a stronger hydrogen bond, the other one is more tightly arranged and stabilized by larger London dispersion interactions. These new spectroscopic results help understand the influence of chirality in molecular aggregation and unveil the kind of interactions involved between a chiral alcohol and a chiral ketone with large dispersion contributions.
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Affiliation(s)
- María Mar Quesada-Moreno
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany. .,Departamento de Química Inorgánica, Facultad de Ciencias, Universidad de Granada, Avda. Fuentenueva s/n, 18071, Granada, Spain
| | - Mariyam Fatima
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany. .,I. Institute of Physics, Universität zu Köln, Zülpicher Straße 77, 50937 Köln, Germany
| | - Robert Medel
- Institut für Physikalische Chemie, Universität Göttingen, Tammannstr. 6, D-37077 Göttingen, Germany.
| | - Cristóbal Pérez
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany. .,Departamento de Química Física y Química Inorgánica, Facultad de Ciencias & I.U. CINQUIMA, Universidad de Valladolid, E-47011 Valladolid, Spain
| | - Melanie Schnell
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany. .,Christian-Albrechts-Universität zu Kiel, Institut für Physikalische Chemie, Max-Eyth-Straße 1, 24118 Kiel, Germany.
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8
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Quesada-Moreno MM, Schnell M, Obenchain DA. Rotational analysis of naphthol-aromatic ring complexes stabilized by electrostatic and dispersion interactions. Phys Chem Chem Phys 2021; 24:1598-1609. [PMID: 34942639 DOI: 10.1039/d1cp04337d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For complexes involving aromatic species, substitution effects can influence the preferred geometry. Using broadband rotational spectroscopy, we report the structures of three naphthol-aromatic ring complexes with different heteroatoms (furan and thiophene) and alkyl groups (2,5-dimethylfuran). The aim was to analyze the influence of the presence of heteroatoms or alkyl groups on the structure of the complex and the kind of intermolecular forces that control it. Face or edge arrangements can take place in these complexes via π-π or O-H⋯O/O-H⋯π interactions, respectively. All the experimentally observed complexes present O-H⋯O/O-H⋯π interactions with the hydroxyl group, with different structures and intermolecular interactions depending on the heteroatom present in the five-membered aromatic rings, yielding different symmetries in the experimental structure. Structures are experimentally identified through the use of planar moments of inertia. Further results from SAPT calculations show that dispersion and electrostatic interactions contribute similarly to the stabilization of all the studied complexes. These new spectroscopic results shed light on the influence of dispersion and hydrogen bonding in molecular aggregation of systems with substituted aromatic residues.
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Affiliation(s)
| | - Melanie Schnell
- Deutsches Elektronen-Synchrotron DESY, Notkestraβe 85, 22607 Hamburg, Germany.,Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Straβe 1, 24118 Kiel, Germany.
| | - Daniel A Obenchain
- Deutsches Elektronen-Synchrotron DESY, Notkestraβe 85, 22607 Hamburg, Germany
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9
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Xu Y, Wei ZY, Li W, Zhang J, Lu T, Jin Y, Zheng WJ, Feng G. Structures and hydrogen bonding of 1,7-dioxaspiro[5.5]undecane and its hydrates. Phys Chem Chem Phys 2021; 23:19289-19296. [PMID: 34525146 DOI: 10.1039/d1cp02964a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The conformations of 1,7DSU and its stepwise solvation by up to 5 water molecules were explored using supersonic-jet Fourier transform microwave spectroscopy with the supplement of theoretical calculations. Experimentally, the rotational spectra of the most stable structures of the monomer, monohydrate and dihydrate were observed and assigned. The characteristics of the stability and intermolecular interaction topologies of the 1,7DSU monomer and its hydrated clusters were obtained by CREST conformational sampling followed by B3LYP-D3(BJ)/def2-TZVP geometrical optimizations and MP2/aug-cc-pVTZ single-point energy calculations. The first water molecule links to the 1,7DSU monomer through an OwH⋯O hydrogen bond. The water molecules tend to aggregate with each other and form cyclic structures for the n = 2-5 clusters. The interactions between water and the 1,7DSU monomer as well as those between water and water were revealed. The analyses of non-covalent interactions and the natural bond orbital suggest that the OwH⋯O1,7DSU, OwH⋯Ow, and CH⋯Ow hydrogen bonds play a prominent role in structural stability.
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Affiliation(s)
- Yugao Xu
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Zhi-You Wei
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Wenqin Li
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Jiaqi Zhang
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Tao Lu
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Yan Jin
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
| | - Wei-Jun Zheng
- Beijing National Laboratory for Molecular Sciences (BNLMS), State Key Laboratory of Molecular Reaction Dynamics, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100190, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Gang Feng
- School of Chemistry and Chemical Engineering, Chongqing University, Daxuecheng South Rd. 55, 401331, Chongqing, China.
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10
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Liu X, Matsuyama Y, Shimohigashi M, Shimohigashi Y. ERα-agonist and ERβ-antagonist bifunctional next-generation bisphenols with no halogens: BPAP, BPB, and BPZ. Toxicol Lett 2021; 345:24-33. [PMID: 33857583 DOI: 10.1016/j.toxlet.2021.04.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/05/2021] [Accepted: 04/09/2021] [Indexed: 12/16/2022]
Abstract
As demonstrated for bisphenol AF (BPAF), the electrostatic halogen bond based on the London dispersion force of halogen atoms was found to be a major driving force of their bifunctional ERα-agonist and ERβ-antagonist activities. Because similar electronic effects are anticipated for hydrocarbon groups (alkyl or aryl groups), we hypothesized that bisphenol compounds consisting of such groups also work bifunctionally. In the present study, we examined bisphenol AP (BPAP), B (BPB), and Z (BPZ). After recognizing their considerably strong receptor binding affinities, we evaluated the abilities of BPAP, BPB, and BPZ to activate ERα and ERβ in a luciferase reporter gene assay. These bisphenols were fully active for ERα but completely inactive for ERβ. When we examined their inhibitory activities for 17β-estradiol in ERβ by two different qualitative and quantitative analytical methods, we found that those bisphenols worked as definite antagonists. Consequently, they were established as bifunctional ERα-agonists and ERβ-antagonists. The present structure-activity analyses revealed that the dispersion force works not only on the halogens but also on the hydrocarbon groups, and that it is a major driving force of bifunctional ERα-agonist and ERβ-antagonist activities.
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Affiliation(s)
- Xiaohui Liu
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan; Department of Applied Microbial Technology, Faculty of Biotechnology and Life Sciences, Sojo University, Kumamoto, 860-0082, Japan.
| | - Yutaka Matsuyama
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan
| | - Miki Shimohigashi
- Division of Biology, Department of Earth System of Science, Faculty of Science, Fukuoka University, Nanakuma, Jonan-ku, Fukuoka, 814-0180, Japan; Risk Science Research Institute, Ikimatsudai 3-7-5, Nishi-ku, Fukuoka, 819-0044, Japan
| | - Yasuyuki Shimohigashi
- Department of Chemistry, Faculty of Science, Kyushu University, Motooka 744, Nishi-ku, Fukuoka, 819-0395, Japan; Risk Science Research Institute, Ikimatsudai 3-7-5, Nishi-ku, Fukuoka, 819-0044, Japan.
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11
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Quesada-Moreno MM, Pinacho P, Pérez C, Šekutor M, Schreiner PR, Schnell M. Do Docking Sites Persist Upon Fluorination? The Diadamantyl Ether-Aromatics Challenge for Rotational Spectroscopy and Theory. Chemistry 2021; 27:6198-6203. [PMID: 33512017 PMCID: PMC8048501 DOI: 10.1002/chem.202100078] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2021] [Indexed: 12/28/2022]
Abstract
Fluorinated derivatives of biological molecules have proven to be highly efficient at modifying the biological activity of a given protein through changes in the stability and the kind of docking interactions. These interactions can be hindered or facilitated based on the hydrophilic/hydrophobic character of a particular protein region. Diadamantyl ether (C20H30O) possesses both kinds of docking sites, serving as a good template to model these important contacts with aromatic fluorinated counterparts. In this work, an experimental study on the structures of several complexes between diadamantyl ether and benzene as well as a series of fluorinated benzenes is reported to analyze the effect of H→F substitution on the interaction and structure of the resulting molecular clusters using rotational spectroscopy. All experimentally observed complexes are largely dominated by London dispersion interactions with the hydrogen‐terminated surface areas of diadamantyl ether. Already single substitution of one hydrogen atom with fluorine changes the preferred docking site of the complexes. However, the overall contributions of the different intermolecular interactions are similar for the different complexes, contrary to previous studies focusing on the difference in interactions using fluorinated and non‐fluorinated molecules.
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Affiliation(s)
| | - Pablo Pinacho
- Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607, Hamburg, Germany
| | - Cristóbal Pérez
- Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607, Hamburg, Germany
| | - Marina Šekutor
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Peter R Schreiner
- Institute of Organic Chemistry, Justus Liebig University, Heinrich-Buff-Ring 17, 35392, Giessen, Germany
| | - Melanie Schnell
- Deutsches Elektronen-Synchrotron (DESY), Notkestr. 85, 22607, Hamburg, Germany.,Institute of Physical Chemistry, Christian-Albrechts-Universität zu Kiel, Max-Eyth-Str. 1, 24118, Kiel, Germany
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12
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Xie F, Fusè M, Hazrah AS, Jäger W, Barone V, Xu Y. Discovering the Elusive Global Minimum in a Ternary Chiral Cluster: Rotational Spectra of Propylene Oxide Trimer. Angew Chem Int Ed Engl 2020; 59:22427-22430. [PMID: 32896062 PMCID: PMC7984290 DOI: 10.1002/anie.202010055] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Indexed: 12/31/2022]
Abstract
The chirality controlled conformational landscape of the trimer of propylene oxide (PO), a prototypical chiral molecule, was investigated using rotational spectroscopy and a range of theoretical tools for conformational searches and for evaluating vibrational contributions to effective structures. Two sets of homochiral (PO)3 rotational transitions were assigned and the associated conformers identified with theoretical support. One set of heterochiral (PO)3 transitions was assigned, but no structures generated by one of the latest, advanced conformational search codes could account for them. With the aid of a Python program, the carbon atom backbone and then the heterochiral (PO)3 structure were generated using 13C isotopic data. Excellent agreement between theoretical and experimental rotational constants and relative dipole moment components of all three conformers was achieved, especially after applying vibrational corrections to the rotational constants.
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Affiliation(s)
- Fan Xie
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Marco Fusè
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126, Pisa, Italy
| | - Arsh S Hazrah
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Wolfgang Jäger
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
| | - Vincenzo Barone
- Scuola Normale Superiore, Piazza dei Cavalieri 7, 56126, Pisa, Italy
| | - Yunjie Xu
- Department of Chemistry, University of Alberta, Edmonton, Alberta, T6G 2G2, Canada
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13
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Fatima M, Maué D, Pérez C, Tikhonov DS, Bernhard D, Stamm A, Medcraft C, Gerhards M, Schnell M. Structures and internal dynamics of diphenylether and its aggregates with water. Phys Chem Chem Phys 2020; 22:27966-27978. [DOI: 10.1039/d0cp04104a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
We report on a detailed multi-spectroscopic analysis of the structures and internal dynamics of diphenylether and its aggregates with up to three water molecules by employing molecular beam experiments.
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Affiliation(s)
- M. Fatima
- Deutsches Elektronen-Synchrotron (DESY)
- D-22607 Hamburg
- Germany
- Institute of Physical Chemistry
- Christian-Albrechts-Universität zu Kiel
| | - D. Maué
- TU Kaiserslautern
- Fachbereich Chemie & Research Center Optimas
- D-67663 Kaiserslautern
- Germany
| | - C. Pérez
- Deutsches Elektronen-Synchrotron (DESY)
- D-22607 Hamburg
- Germany
- Institute of Physical Chemistry
- Christian-Albrechts-Universität zu Kiel
| | - D. S. Tikhonov
- Deutsches Elektronen-Synchrotron (DESY)
- D-22607 Hamburg
- Germany
- Institute of Physical Chemistry
- Christian-Albrechts-Universität zu Kiel
| | - D. Bernhard
- TU Kaiserslautern
- Fachbereich Chemie & Research Center Optimas
- D-67663 Kaiserslautern
- Germany
| | - A. Stamm
- TU Kaiserslautern
- Fachbereich Chemie & Research Center Optimas
- D-67663 Kaiserslautern
- Germany
| | - C. Medcraft
- Deutsches Elektronen-Synchrotron (DESY)
- D-22607 Hamburg
- Germany
- Institute of Physical Chemistry
- Christian-Albrechts-Universität zu Kiel
| | - M. Gerhards
- TU Kaiserslautern
- Fachbereich Chemie & Research Center Optimas
- D-67663 Kaiserslautern
- Germany
| | - M. Schnell
- Deutsches Elektronen-Synchrotron (DESY)
- D-22607 Hamburg
- Germany
- Institute of Physical Chemistry
- Christian-Albrechts-Universität zu Kiel
| |
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