1
|
Butera V, D’Anna L, Rubino S, Bonsignore R, Spinello A, Terenzi A, Barone G. How the Metal Ion Affects the 1H NMR Chemical Shift Values of Schiff Base Metal Complexes: Rationalization by DFT Calculations. J Phys Chem A 2023; 127:9283-9290. [PMID: 37906682 PMCID: PMC10641838 DOI: 10.1021/acs.jpca.3c05653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 10/09/2023] [Accepted: 10/16/2023] [Indexed: 11/02/2023]
Abstract
The chemical shift (CS) values obtained by 1H NMR spectroscopy for the hydrogen atoms of a tetradentate N2O2-substituted Salphen ligand (H2L1) are differently shifted in its complexes of nickel(II), palladium(II), platinum(II), and zinc(II), all bearing the same charge on the metal ions. To rationalize the observed trends, DFT calculations have been performed in the implicit d6-DMSO solvent in terms of the electronic effects induced by the metal ion and of the nature and strength of the metal-N and metal-O bonds. Overall, the results obtained point out that, in the complexes involving group 10 elements, the CS values show the greater shift when considering the two hydrogen atoms at a shorter distance from the coordinated metal center and follow the decreasing metal charge in the order Ni > Pd > Pt. This trend suggests a more covalent character of the ligand-metal bonds with the increase of the metal atomic number. Furthermore, a slightly poorer agreement between experimental and calculated data is observed in the presence of the nickel(II) ion. Such discrepancy is explained by the formation of stacked oligomers, aimed at minimizing the repulsive interactions with the polar DMSO solvent.
Collapse
Affiliation(s)
| | | | - Simona Rubino
- Dipartimento di Scienze e
Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Riccardo Bonsignore
- Dipartimento di Scienze e
Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Angelo Spinello
- Dipartimento di Scienze e
Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Alessio Terenzi
- Dipartimento di Scienze e
Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| | - Giampaolo Barone
- Dipartimento di Scienze e
Tecnologie Biologiche, Chimiche e Farmaceutiche, University of Palermo, viale delle Scienze Edificio 17, Palermo 90128, Italy
| |
Collapse
|
2
|
Huang H, Yue L, Deng F, Wang X, Wang N, Chen H, Li H. NMR-Metabolomic Profiling and Genome Mining Drive the Discovery of Cyclic Decapeptides from a Marine Streptomyces. JOURNAL OF NATURAL PRODUCTS 2023; 86:2122-2130. [PMID: 37672645 DOI: 10.1021/acs.jnatprod.3c00310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/08/2023]
Abstract
The integration of NMR-metabolomic and genomic analyses can provide enhanced identification of structural properties as well as key biosynthetic information, thus achieving the targeted discovery of new natural products. For this purpose, NMR-based metabolomic profiling of the marine-derived Streptomyces sp. S063 (CGMCC 14582) was performed, by which N-methylated peptides possessing unusual negative 1H NMR chemical shift values were tracked. Meanwhile, genome mining of this strain revealed the presence of an unknown NRPS gene cluster (len) with piperazic-acid-encoding genes (lenE and lenF). Under the guidance of the combined information, two cyclic decapeptides, lenziamides D1 (1) and B1 (2), were isolated from Streptomyces sp. S063, which contains piperazic acids with negative 1H NMR values. The structures of 1 and 2 were determined by extensive spectroscopic analysis combined with Marfey's method and ECD calculations. Furthermore, we provided a detailed model of lenziamide (1 and 2) biosynthesis in Streptomyces sp. S063. In the cytotoxicity evaluation, 1 and 2 showed moderate growth inhibition against the human cancer cells HEL, H1975, H1299, and drug-resistant A549-taxol with IC50 values of 8-24 μM.
Collapse
Affiliation(s)
- Huiming Huang
- School of Life Sciences, Liaocheng University, Liaocheng 252000, China
| | - Liangguang Yue
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266100, China
| | - Fayu Deng
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266100, China
| | - Xiaoyu Wang
- School of Life Sciences, Liaocheng University, Liaocheng 252000, China
| | - Ning Wang
- School of Life Sciences, Liaocheng University, Liaocheng 252000, China
| | - Hu Chen
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266100, China
| | - Huayue Li
- Key Laboratory of Marine Drugs, Ministry of Education of China, School of Medicine and Pharmacy, Ocean University of China, Qingdao 266100, China
- Laboratory for Marine Drugs and Bioproducts, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266237, China
| |
Collapse
|
3
|
Yang H, Hinz A, Fan Q, Xie S, Qi X, Huang W, Li Q, Sun H, Li X. Control over Selectivity in Alkene Hydrosilylation Catalyzed by Cobalt(III) Hydride Complexes. Inorg Chem 2022; 61:19710-19725. [PMID: 36455154 DOI: 10.1021/acs.inorgchem.2c02094] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Abstract
Two new bisphosphine [PCP] pincer cobalt(III) hydrides, [(L1)Co(PMe3)(H)(Cl)] (L11, L1 = 2,6-((Ph2P)(Et)N)2C6H3) and [(L2)Co(PMe3)(H)(Cl)] (L21, L2 = 2,6-((iPr2P)(Et)N)2C6H3), as well as one new bissilylene [SiCSi] pincer cobalt(III) hydride, [(L3)Co(PMe3)(H)(Cl)] (L31, L3 = 1,3-((PhC(tBuN)2Si)(Et)N)2C6H3), were synthesized by reaction of the corresponding protic [PCP] or [SiCSi] pincer ligands L1H, L2H, and L3H with CoCl(PMe3)3. Despite the similarities in the ligand scaffolds, the three cobalt(III) hydrides show remarkably different performance as catalysts in alkene hydrosilylation. Among the PCP pincer complexes, L11 has higher catalytic activity than complex L21, and both catalysts afford anti-Markovnikov selectivity for both aliphatic and aromatic alkenes. In contrast, the catalytic activity for alkene hydrosilylation of silylene complex L31 is comparable to phosphine complex L11, but a dependence of regioselectivity on the substrates was observed: While aliphatic alkenes are converted in an anti-Markovnikov fashion, the hydrosilylation of aromatic alkenes affords Markovnikov products. The substrate scope was explored with 28 examples. Additional experiments were conducted to elucidate these mechanisms of hydrosilylation. The synthesis of cobalt(I) complex (L1)Co(PMe3)2 (L17) and its catalytic properties for alkene hydrosilylation allowed for the proposal of the mechanistic variations that occur in dependence of reaction conditions and substrates.
Collapse
Affiliation(s)
- Haiquan Yang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China
| | - Alexander Hinz
- Institute for Inorganic Chemistry (AOC), Karlsruhe Institute of Technology (KIT), Engesserstr. 15, 76131 Karlsruhe, Germany
| | - Qingqing Fan
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China
| | - Shangqing Xie
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China
| | - Xinghao Qi
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China
| | - Wei Huang
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China
| | - Qingshuang Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China
| | - Hongjian Sun
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China
| | - Xiaoyan Li
- School of Chemistry and Chemical Engineering, Key Laboratory of Special Functional Aggregated Materials, Ministry of Education, Shandong University, Shanda Nanlu 27, Jinan 250100, People's Republic of China
| |
Collapse
|
4
|
Potential scorpionate ligand derived from heterocyclic 2,4(1H,3H)-pyrimidinedithione: Synthesis, spectroscopic characterization and DFT studies. Polyhedron 2022. [DOI: 10.1016/j.poly.2022.115769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
|
5
|
Barker SJ, Dagys L, Hale W, Ripka B, Eills J, Sharma M, Levitt MH, Utz M. Direct Production of a Hyperpolarized Metabolite on a Microfluidic Chip. Anal Chem 2022; 94:3260-3267. [PMID: 35147413 PMCID: PMC9096798 DOI: 10.1021/acs.analchem.1c05030] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
![]()
Microfluidic systems hold great potential
for the study of live
microscopic cultures of cells, tissue samples, and small organisms.
Integration of hyperpolarization would enable quantitative studies
of metabolism in such volume limited systems by high-resolution NMR
spectroscopy. We demonstrate, for the first time, the integrated generation
and detection of a hyperpolarized metabolite on a microfluidic chip.
The metabolite [1-13C]fumarate is produced in a nuclear
hyperpolarized form by (i) introducing para-enriched hydrogen into
the solution by diffusion through a polymer membrane, (ii) reaction
with a substrate in the presence of a ruthenium-based catalyst, and
(iii) conversion of the singlet-polarized reaction product into a
magnetized form by the application of a radiofrequency pulse sequence,
all on the same microfluidic chip. The microfluidic device delivers
a continuous flow of hyperpolarized material at the 2.5 μL/min
scale, with a polarization level of 4%. We demonstrate two methods
for mitigating singlet–triplet mixing effects which otherwise
reduce the achieved polarization level.
Collapse
Affiliation(s)
- Sylwia J Barker
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Laurynas Dagys
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - William Hale
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom.,Department of Chemistry, University of Florida, Gainesville 32611, United States
| | - Barbara Ripka
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - James Eills
- Institute for Physics, Johannes Gutenberg University, D-55090 Mainz, Germany.,GSI Helmholtzzentrum für Schwerionenforschung GmbH, Helmholtz-Institut Mainz, 55128 Mainz, Germany
| | - Manvendra Sharma
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Malcolm H Levitt
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| | - Marcel Utz
- School of Chemistry, University of Southampton, Southampton SO17 1BJ, United Kingdom
| |
Collapse
|
6
|
Höllerhage T, Ghana P, Spaniol TP, Carpentier A, Maron L, Englert U, Okuda J. Bildung und Reaktivität eines Hydridosilikats [SiH
6
]
2−
, koordiniert an einem durch einen Makrozyklus stabilisierten Strontiumkation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202115379] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Thomas Höllerhage
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Priyabrata Ghana
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Thomas P. Spaniol
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Ambre Carpentier
- CNRS INSA UPS UMR 5215 LPCNO Université de Toulouse 135 avenue de Rangueil 31077 Toulouse Frankreich
| | - Laurent Maron
- CNRS INSA UPS UMR 5215 LPCNO Université de Toulouse 135 avenue de Rangueil 31077 Toulouse Frankreich
| | - Ulli Englert
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| | - Jun Okuda
- Institut für Anorganische Chemie RWTH Aachen University Landoltweg 1 52056 Aachen Deutschland
| |
Collapse
|
7
|
Okuda J, Höllerhage T, Ghana P, Spaniol TP, Carpentier A, Maron L, Englert U. Formation and Reactivity of a Hexahydridosilicate [SiH6]2- Coordinated by a Macrocycle-Supported Strontium Cation. Angew Chem Int Ed Engl 2021; 61:e202115379. [PMID: 34874085 PMCID: PMC9303417 DOI: 10.1002/anie.202115379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Indexed: 11/12/2022]
Abstract
The cationic benzyl complex [(Me4TACD)Sr(CH2Ph)][A] (Me4TACD=1,4,7,10‐tetramethyltetraazacyclododecane; A=B(C6H3‐3,5‐Me2)4) reacted with two equivalents of phenylsilane to give the bridging hexahydridosilicate complex [(Me4TACD)2Sr2(thf)4(μ‐κ3 : κ3‐SiH6)][A]2 (3 a). Rapid phenyl exchange between phenylsilane molecules is assumed to generate monosilane SiH4 that is trapped by two strontium hydride cations [(Me4TACD)SrH(thf)x]+. Complex 3 a decomposed in THF at room temperature to give the terminal silanide complex [(Me4TACD)Sr(SiH3)(thf)2][A], with release of H2. Upon reaction with a weak Brønsted acid, CO2, and 1,3,5,7‐cyclooctatetraene SiH4 was released. The reaction of a 1 : 2 mixture of cationic benzyl and neutral dibenzyl complex with phenylsilane gave the trinuclear silanide complex [(Me4TACD)3Sr3(μ2‐H)3(μ3‐SiH3)2][A], while nOctSiH3 led to the trinuclear (n‐octyl)pentahydridosilicate complex [(Me4TACD)3Sr3(μ2‐H)3(μ3‐SiH5nOct)][A].
Collapse
Affiliation(s)
- Jun Okuda
- RWTH Aachen, Institut für Anorganische Chemie, Landoltweg 1, 52074, Aachen, GERMANY
| | - Thomas Höllerhage
- Rheinisch-Westfalische Technische Hochschule Aachen, Chemistry, GERMANY
| | - Priyabrata Ghana
- Rheinisch-Westfalische Technische Hochschule Aachen, Chemistry, GERMANY
| | - Thomas P Spaniol
- Rheinisch-Westfälische Technische Hochschule Aachen Medizinische Fakultät: Rheinisch-Westfalische Technische Hochschule Aachen Medizinische Fakultat, Chemistry, GERMANY
| | - Ambre Carpentier
- Universite de Toulouse 3: Universite Toulouse III Paul Sabatier, CNRS, FRANCE
| | - Laurent Maron
- Universite de Toulouse 3: Universite Toulouse III Paul Sabatier, CNRS, FRANCE
| | - Ulli Englert
- Rheinisch-Westfalische Technische Hochschule Aachen, Chemie, GERMANY
| |
Collapse
|
8
|
|
9
|
Moraru IT, Martínez-Prieto LM, Coppel Y, Chaudret B, Cusinato L, Del Rosal I, Poteau R. A combined theoretical/experimental study highlighting the formation of carbides on Ru nanoparticles during CO hydrogenation. NANOSCALE 2021; 13:6902-6915. [PMID: 33885491 DOI: 10.1039/d0nr08735a] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Formation of stable carbides during CO bond dissociation on small ruthenium nanoparticles (RuNPs) is demonstrated, both by means of DFT calculations and by solid state 13C NMR techniques. Theoretical calculations of chemical shifts in several model clusters are employed in order to secure experimental spectroscopic assignations for surface ruthenium carbides. Mechanistic DFT investigations, carried out on a realistic Ru55 nanoparticle model (∼1 nm) in terms of size, structure and surface composition, reveal that ruthenium carbides are obtained during CO hydrogenation. Calculations also indicate that carbide formation via hydrogen-assisted hydroxymethylidyne (COH) pathways is exothermic and occurs at reasonable kinetic cost on standard sites of the RuNPs, such as 4-fold ones on flat terraces, and not only in steps as previously suggested. Another novel outcome of the DFT mechanistic study consists of the possible formation of μ6 ruthenium carbides in the tip-B5 site, similar examples being known only for molecular ruthenium clusters. Moreover, based on DFT energies, the possible rearrangement of the surface metal atoms around the same tip-site results in a μ-Ru atom coordinated to the remaining RuNP moiety, reminiscent of a pseudo-octahedral metal center on the NP surface.
Collapse
Affiliation(s)
- Ionut-Tudor Moraru
- Université de Toulouse; INSA, UPS, CNRS; LPCNO (IRSAMC), 135 avenue de Rangueil, F-31077 Toulouse, France.
| | | | | | | | | | | | | |
Collapse
|
10
|
Attia AS, Alfallous KA, El-Shahat M. A novel quinoxalinedione-bicapped tri-ruthenium carbonyl cluster [Ru3(μ-H)2(CO)6(μ3-HDCQX)2]: synthesis, characterization, anticancer activity and theoretical investigation of Ru–Ru and Ru–Ligand bonding interactions. Polyhedron 2021. [DOI: 10.1016/j.poly.2020.114889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
11
|
Latypov SK, Kondrashova SA, Polyancev FM, Sinyashin OG. Quantum Chemical Calculations of 31P NMR Chemical Shifts in Nickel Complexes: Scope and Limitations. Organometallics 2020. [DOI: 10.1021/acs.organomet.0c00127] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Shamil K. Latypov
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, Kazan, Tatarstan, Russian Federation 420083
| | - Svetlana A. Kondrashova
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, Kazan, Tatarstan, Russian Federation 420083
| | - Fedor M. Polyancev
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, Kazan, Tatarstan, Russian Federation 420083
| | - Oleg G. Sinyashin
- Arbuzov Institute of Organic and Physical Chemistry, FRC Kazan Scientific Center of RAS, Arbuzov str. 8, Kazan, Tatarstan, Russian Federation 420083
| |
Collapse
|
12
|
Pavlovic L, Vaitla J, Bayer A, Hopmann KH. Rhodium-Catalyzed Hydrocarboxylation: Mechanistic Analysis Reveals Unusual Transition State for Carbon–Carbon Bond Formation. Organometallics 2018. [DOI: 10.1021/acs.organomet.7b00899] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Ljiljana Pavlovic
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Tromsø-The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Janakiram Vaitla
- Department of Chemistry, University of Tromsø-The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Annette Bayer
- Department of Chemistry, University of Tromsø-The Arctic University of Norway, N-9037 Tromsø, Norway
| | - Kathrin H. Hopmann
- Hylleraas Centre for Quantum Molecular Sciences, Department of Chemistry, University of Tromsø-The Arctic University of Norway, N-9037 Tromsø, Norway
| |
Collapse
|
13
|
Häller LJL, Mas-Marzá E, Cybulski MK, Sanguramath RA, Macgregor SA, Mahon MF, Raynaud C, Russell CA, Whittlesey MK. Computation provides chemical insight into the diverse hydride NMR chemical shifts of [Ru(NHC) 4(L)H] 0/+ species (NHC = N-heterocyclic carbene; L = vacant, H 2, N 2, CO, MeCN, O 2, P 4, SO 2, H -, F - and Cl -) and their [Ru(R 2PCH 2CH 2PR 2) 2(L)H] + congeners. Dalton Trans 2018; 46:2861-2873. [PMID: 28245022 DOI: 10.1039/c7dt00117g] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Relativistic density functional theory calculations, both with and without the effects of spin-orbit coupling, have been employed to model hydride NMR chemical shifts for a series of [Ru(NHC)4(L)H]0/+ species (NHC = N-heterocyclic carbene; L = vacant, H2, N2, CO, MeCN, O2, P4, SO2, H-, F- and Cl-), as well as selected phosphine analogues [Ru(R2PCH2CH2PR2)2(L)H]+ (R = iPr, Cy; L = vacant, O2). Inclusion of spin-orbit coupling provides good agreement with the experimental data. For the NHC systems large variations in hydride chemical shift are shown to arise from the paramagnetic term, with high net shielding (L = vacant, Cl-, F-) being reinforced by the contribution from spin-orbit coupling. Natural chemical shift analysis highlights the major orbital contributions to the paramagnetic term and rationalizes trends via changes in the energies of the occupied Ru dπ orbitals and the unoccupied σ*Ru-H orbital. In [Ru(NHC)4(η2-O2)H]+ a δ-interaction with the O2 ligand results in a low-lying LUMO of dπ character. As a result this orbital can no longer contribute to the paramagnetic shielding, but instead provides additional deshielding via overlap with the remaining (occupied) dπ orbital under the Lz angular momentum operator. These two effects account for the unusual hydride chemical shift of +4.8 ppm observed experimentally for this species. Calculations reproduce hydride chemical shift data observed for [Ru(iPr2PCH2CH2PiPr2)2(η2-O2)H]+ (δ = -6.2 ppm) and [Ru(R2PCH2CH2PR2)2H]+ (ca. -32 ppm, R = iPr, Cy). For the latter, the presence of a weak agostic interaction trans to the hydride ligand is significant, as in its absence (R = Me) calculations predict a chemical shift of -41 ppm, similar to the [Ru(NHC)4H]+ analogues. Depending on the strength of the agostic interaction a variation of up to 18 ppm in hydride chemical shift is possible and this factor (that is not necessarily readily detected experimentally) can aid in the interpretation of hydride chemical shift data for nominally unsaturated hydride-containing species. The synthesis and crystallographic characterization of the BArF4- salts of [Ru(IMe4)4(L)H]+ (IMe4 = 1,3,4,5-tetramethylimidazol-2-ylidene; L = P4, SO2; ArF = 3,5-(CF3)2C6H3) and [Ru(IMe4)4(Cl)H] are also reported.
Collapse
Affiliation(s)
- L Jonas L Häller
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
| | - Elena Mas-Marzá
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Mateusz K Cybulski
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | | | - Stuart A Macgregor
- Institute of Chemical Sciences, Heriot-Watt University, Edinburgh, EH14 4AS, UK.
| | - Mary F Mahon
- Department of Chemistry, University of Bath, Claverton Down, Bath BA2 7AY, UK.
| | - Christophe Raynaud
- Institut Charles Gerhardt, CNRS 5253, Université de Montpellier, Bâtiment 15, CC 1501, Place Eugène Bataillon, 34 095 Montpellier Cedex 5, France.
| | | | | |
Collapse
|
14
|
|
15
|
Loffi C, Rogolino D, Verdolino V, Pelagatti P. Elucidation of the Structure and Fluxionality of a Dinuclear Organometallic Complex Reluctant to Crystallize: An Experimental and Theoretical Integrated Approach. ChemistrySelect 2017. [DOI: 10.1002/slct.201702034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Cecilia Loffi
- Department of Chemical Science; Life Science and Environmental Sustainability; Università degli Studi di Parma; Parco Area delle Scienze 17/a 43124 Parma Italy
| | - Dominga Rogolino
- Department of Chemical Science; Life Science and Environmental Sustainability; Università degli Studi di Parma; Parco Area delle Scienze 17/a 43124 Parma Italy
| | - Vincenzo Verdolino
- Department of Chemistry and Applied Biosciences Campus; Switzerland, ETH Zurich, c/o Università della Svizzera Italiana; 6900 Lugano Switzerland
- Facoltà di Informatica; Istituto di Scienze Computazionali; Università della Svizzera Italiana; 69000 Lugano Switzerland
| | - Paolo Pelagatti
- Department of Chemical Science; Life Science and Environmental Sustainability; Università degli Studi di Parma; Parco Area delle Scienze 17/a 43124 Parma Italy
| |
Collapse
|
16
|
Arévalo R, Vogels CM, MacNeil GA, Riera L, Pérez J, Westcott SA. Rhenium-catalysed hydroboration of aldehydes and aldimines. Dalton Trans 2017; 46:7750-7757. [DOI: 10.1039/c7dt01549f] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
The first examples of the catalysed hydroboration of aldehydes and aldimines using low- and high-valent rhenium complexes are reported.
Collapse
Affiliation(s)
- Rebeca Arévalo
- Departamento de Química Orgánica e Inorgánica
- Universidad de Oviedo
- Oviedo
- Spain
| | | | - Gregory A. MacNeil
- Department of Chemistry and Biochemistry
- Mount Allison University
- Sackville
- Canada
| | - Lucía Riera
- Centro de Investigación en Nanomateriales y Nanotecnología (CINN)
- CSIC-Universidad de Oviedo-Principado de Asturias
- El Entrego
- Spain
| | - Julio Pérez
- Departamento de Química Orgánica e Inorgánica
- Universidad de Oviedo
- Oviedo
- Spain
- Centro de Investigación en Nanomateriales y Nanotecnología (CINN)
| | - Stephen A. Westcott
- Department of Chemistry and Biochemistry
- Mount Allison University
- Sackville
- Canada
| |
Collapse
|
17
|
Hill DE, Vasdev N, Holland JP. Evaluating the accuracy of density functional theory for calculating 1H and 13C NMR chemical shifts in drug molecules. COMPUT THEOR CHEM 2015. [DOI: 10.1016/j.comptc.2014.11.007] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
18
|
Wang L, Kefalidis CE, Roisnel T, Sinbandhit S, Maron L, Carpentier JF, Sarazin Y. Structure vs 119Sn NMR Chemical Shift in Three-Coordinated Tin(II) Complexes: Experimental Data and Predictive DFT Computations. Organometallics 2014. [DOI: 10.1021/om5007566] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Lingfang Wang
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS−Université de Rennes 1, Campus de Beaulieu, 35042 Rennes
Cedex, France
| | - Christos E. Kefalidis
- Laboratoire
de Physique et Chimie de Nano-objets, UMR 5215 CNRS−Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Thierry Roisnel
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS−Université de Rennes 1, Campus de Beaulieu, 35042 Rennes
Cedex, France
| | - Sourisak Sinbandhit
- Centre
Régional des Mesures Physiques de l’Ouest, Université de Rennes 1, 35042 Rennes Cedex, France
| | - Laurent Maron
- Laboratoire
de Physique et Chimie de Nano-objets, UMR 5215 CNRS−Université de Toulouse, 135 Avenue de Rangueil, 31077 Toulouse, France
| | - Jean-François Carpentier
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS−Université de Rennes 1, Campus de Beaulieu, 35042 Rennes
Cedex, France
| | - Yann Sarazin
- Institut
des Sciences Chimiques de Rennes, UMR 6226 CNRS−Université de Rennes 1, Campus de Beaulieu, 35042 Rennes
Cedex, France
| |
Collapse
|
19
|
Gutmann T, Grünberg A, Rothermel N, Werner M, Srour M, Abdulhussain S, Tan S, Xu Y, Breitzke H, Buntkowsky G. Solid-state NMR concepts for the investigation of supported transition metal catalysts and nanoparticles. SOLID STATE NUCLEAR MAGNETIC RESONANCE 2013; 55-56:1-11. [PMID: 23972428 DOI: 10.1016/j.ssnmr.2013.06.004] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2013] [Revised: 06/20/2013] [Accepted: 06/21/2013] [Indexed: 05/24/2023]
Abstract
In recent years, solid-state NMR spectroscopy has evolved into an important characterization tool for the study of solid catalysts and chemical processes on their surface. This interest is mainly triggered by the need of environmentally benign organic transformations ("green chemistry"), which has resulted in a large number of new catalytically active hybrid materials, which are organized on the meso- and nanoscale. Typical examples of these catalysts are supported homogeneous transition metal catalysts or transition metal nanoparticles (MNPs). Solid-state NMR spectroscopy is able to characterize both the structures of these materials and the chemical processes on the catalytic surface. This article presents recent trends both on the characterization of immobilized homogeneous transition metal catalysts and on the characterization of surface species on transition metal surfaces.
Collapse
Affiliation(s)
- Torsten Gutmann
- Institute of Physical Chemistry, Technical University Darmstadt, Petersenstrasse 22, D-64287 Darmstadt, Germany
| | | | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Gutmann T, Bonnefille E, Breitzke H, Debouttière PJ, Philippot K, Poteau R, Buntkowsky G, Chaudret B. Investigation of the surface chemistry of phosphine-stabilized ruthenium nanoparticles – an advanced solid-state NMR study. Phys Chem Chem Phys 2013; 15:17383-94. [DOI: 10.1039/c3cp52927d] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
21
|
Geetharani K, Krishnamoorthy BS, Kahlal S, Mobin SM, Halet JF, Ghosh S. Synthesis and Characterization of Hypoelectronic Tantalaboranes: Comparison of the Geometric and Electronic Structures of [(Cp*TaX)2B5H11] (X = Cl, Br, and I). Inorg Chem 2012; 51:10176-84. [DOI: 10.1021/ic300848f] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- K. Geetharani
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600
036, India
| | - Bellie Sundaram Krishnamoorthy
- Institut des
Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, Avenue du Général Leclerc, Rennes Cedex,
France
| | - Samia Kahlal
- Institut des
Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, Avenue du Général Leclerc, Rennes Cedex,
France
| | - Shaikh M. Mobin
- National Single Crystal
X-ray
Diffraction Facility, Indian Institute of Technology Bombay, Mumbai 400 076, India
| | - Jean-François Halet
- Institut des
Sciences Chimiques
de Rennes, UMR 6226 CNRS-Université de Rennes 1, Avenue du Général Leclerc, Rennes Cedex,
France
| | - Sundargopal Ghosh
- Department of Chemistry, Indian Institute of Technology Madras, Chennai 600
036, India
| |
Collapse
|
22
|
Bhattacharjee A, Chavarot-Kerlidou M, Andreiadis ES, Fontecave M, Field MJ, Artero V. Combined Experimental–Theoretical Characterization of the Hydrido-Cobaloxime [HCo(dmgH)2(PnBu3)]. Inorg Chem 2012; 51:7087-93. [DOI: 10.1021/ic2024204] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Anirban Bhattacharjee
- Dynamo Team, DYNAMOP Group,
UMR 5075, Université Grenoble 1,
CNRS, CEA; Institut de Biologie Structurale “Jean-Pierre Ebel”,
41 rue Jules Horowitz, 38027 Grenoble Cedex 1, France
| | - Murielle Chavarot-Kerlidou
- Laboratoire de Chimie et Biologie
des Métaux, UMR 5249, Université Grenoble 1, CNRS, CEA DSV/iRTSV; CEA-Grenoble, 17 rue des Martyrs
F-38054 Grenoble Cedex 9, France
| | - Eugen. S. Andreiadis
- Laboratoire de Chimie et Biologie
des Métaux, UMR 5249, Université Grenoble 1, CNRS, CEA DSV/iRTSV; CEA-Grenoble, 17 rue des Martyrs
F-38054 Grenoble Cedex 9, France
| | - Marc Fontecave
- Laboratoire de Chimie et Biologie
des Métaux, UMR 5249, Université Grenoble 1, CNRS, CEA DSV/iRTSV; CEA-Grenoble, 17 rue des Martyrs
F-38054 Grenoble Cedex 9, France
- Collège de France, 11 place Marcellin-Berthelot, 75005 Paris, France
| | - Martin J. Field
- Dynamo Team, DYNAMOP Group,
UMR 5075, Université Grenoble 1,
CNRS, CEA; Institut de Biologie Structurale “Jean-Pierre Ebel”,
41 rue Jules Horowitz, 38027 Grenoble Cedex 1, France
| | - Vincent Artero
- Laboratoire de Chimie et Biologie
des Métaux, UMR 5249, Université Grenoble 1, CNRS, CEA DSV/iRTSV; CEA-Grenoble, 17 rue des Martyrs
F-38054 Grenoble Cedex 9, France
| |
Collapse
|
23
|
Al-Ibadi MAM, Duckett SB, McGrady JE. Characterisation of tri-ruthenium dihydride complexes through the computation of NMR parameters. Dalton Trans 2012; 41:4618-25. [DOI: 10.1039/c2dt12057g] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
24
|
Motokura K, Nakayama K, Miyaji A, Baba T. “Ligand-Consuming” Formation of Rhodium-Hydride Species from [Rh(OH)(cod)]2 Without any Additional Hydride Sources for Catalytic Olefin Isomerizations and Cyclobutene Synthesis. ChemCatChem 2011. [DOI: 10.1002/cctc.201100185] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
25
|
Hrobárik P, Hrobáriková V, Meier F, Repiský M, Komorovský S, Kaupp M. Relativistic Four-Component DFT Calculations of 1H NMR Chemical Shifts in Transition-Metal Hydride Complexes: Unusual High-Field Shifts Beyond the Buckingham–Stephens Model. J Phys Chem A 2011; 115:5654-9. [DOI: 10.1021/jp202327z] [Citation(s) in RCA: 103] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Peter Hrobárik
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84536 Bratislava, Slovakia
| | - Veronika Hrobáriková
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
- Department of Organic Chemistry, Faculty of Natural Sciences, Comenius University, Mlynská dolina, SK-84215 Bratislava, Slovakia
| | - Florian Meier
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| | - Michal Repiský
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84536 Bratislava, Slovakia
- Center for Theoretical and Computational Chemistry, Department of Chemistry, University of Trømso, N-9037, Trømso, Norway
| | - Stanislav Komorovský
- Institute of Inorganic Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84536 Bratislava, Slovakia
| | - Martin Kaupp
- Institut für Chemie, Technische Universität Berlin, Strasse des 17. Juni 135, D-10623 Berlin, Germany
| |
Collapse
|
26
|
del Rosal I, Gutmann T, Walaszek B, Gerber IC, Chaudret B, Limbach HH, Buntkowsky G, Poteau R. 2H NMR calculations on polynuclear transition metal complexes: on the influence of local symmetry and other factors. Phys Chem Chem Phys 2011; 13:20199-207. [DOI: 10.1039/c1cp22081k] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
27
|
Gutmann T, Walaszek B, Yeping X, Wächtler M, del Rosal I, Grünberg A, Poteau R, Axet R, Lavigne G, Chaudret B, Limbach HH, Buntkowsky G. Hydrido-Ruthenium Cluster Complexes as Models for Reactive Surface Hydrogen Species of Ruthenium Nanoparticles. Solid-State 2H NMR and Quantum Chemical Calculations. J Am Chem Soc 2010; 132:11759-67. [DOI: 10.1021/ja104229a] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Torsten Gutmann
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Bernadeta Walaszek
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Xu Yeping
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Maria Wächtler
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Iker del Rosal
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Anna Grünberg
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Romuald Poteau
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Rosa Axet
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Guy Lavigne
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Bruno Chaudret
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Hans-Heinrich Limbach
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| | - Gerd Buntkowsky
- Institut für Physikalische Chemie, Technische Universität Darmstadt, Petersenstrasse 20, D-64287 Darmstadt, Germany, Physikalisch-Technische Bundesanstalt, Abbestrasse 2-12, D-10587 Berlin, Germany, Institut für Physikalische Chemie, Friedrich-Schiller Universität Jena, Helmholtzweg 4, D-07743 Jena, Germany, Université de Toulouse, INSA, UPS, CNRS, LPCNO, 135 avenue de Rangueil, F-31077 Toulouse, France, Laboratoire de Chimie de Coordination du CNRS, 205, Route de Narbonne, 31077 Toulouse Cedex 04,
| |
Collapse
|
28
|
del Rosal I, Gutmann T, Maron L, Jolibois F, Chaudret B, Walaszek B, Limbach HH, Poteau R, Buntkowsky G. DFT 2H quadrupolar coupling constants of ruthenium complexes: a good probe of the coordination of hydrides in conjuction with experiments. Phys Chem Chem Phys 2009; 11:5657-63. [PMID: 19842483 DOI: 10.1039/b822150b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Transition metal (TM) hydrides are of great interest in chemistry because of their reactivity and their potential as catalysts for hydrogenation reactions. 2H solid-state NMR can be used in order to get information about the local environment of hydrogen atoms, and more particularly the coordination mode of hydrides in such complexes. In this work we will show that it is possible to establish at the level of density functional theory (DFT) a viable methodological strategy that allows the determination of 2H NMR parameters, namely the quadrupolar coupling constant (C(Q)) respectively the quadrupolar splitting (deltanuQ) and the asymmetry parameter (etaQ). The reliability of the method (B3PW91-DFT) and basis set effects have been first evaluated for simple organic compounds (benzene and fluorene). A good correlation between experimental and theoretical values is systematically obtained if the large basis set cc-pVTZ is used for the computations. 2H NMR properties of five mononuclear ruthenium complexes (namely Cp*RuD3(PPh3), Tp*RuD(THT)2, Tp*RuD(D2)(THT) and Tp*RuD(D2)2 and RuD2(D2)2(PCy3)2) which exhibit different ligands and hydrides involved in different coordination modes (terminal-H or eta2-H2), have been calculated and compared to previous experimental data. The results obtained are in excellent agreement with experiments. Although 2H NMR spectra are not always easy to analyze, assistance by quantum chemistry calculations allows unambiguous assignment of the signals of such spectra. As far as experiments can be achieved at very low temperatures in order to avoid dynamic effects, this hybrid theoretical/experimental tool may give useful insights in the context of the characterization of ruthenium surfaces or nanoparticles with solid-state NMR.
Collapse
Affiliation(s)
- Iker del Rosal
- Université de Toulouse; INSA, UPS; LPCNO, IRSAMC; 135 avenue de Rangueil, F-31077 Toulouse, France
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Tsoureas N, Bevis T, Butts CP, Hamilton A, Owen GR. Further Exploring the “Sting of the Scorpion”: Hydride Migration and Subsequent Rearrangement of Norbornadiene to Nortricyclyl on Rhodium(I). Organometallics 2009. [DOI: 10.1021/om900499v] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Nikolaos Tsoureas
- The School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
| | - Thomas Bevis
- The School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
| | - Craig P. Butts
- The School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
| | - Alex Hamilton
- The School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
| | - Gareth R. Owen
- The School of Chemistry, University of Bristol, Bristol BS8 1TS, U.K
| |
Collapse
|
30
|
Raynaud C, del Rosal I, Jolibois F, Maron L, Poteau R. Multicentered effective group potentials: ligand-field effects in organometallic clusters and dynamical study of chemical reactivity. Theor Chem Acc 2009. [DOI: 10.1007/s00214-009-0615-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
31
|
Del Rosal I, Jolibois F, Maron L, Philippot K, Chaudret B, Poteau R. Ligand effect on the NMR, vibrational and structural properties of tetra- and hexanuclear ruthenium hydrido clusters: a theoretical investigation. Dalton Trans 2009:2142-56. [PMID: 19274293 DOI: 10.1039/b817055j] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Structural and spectroscopic properties of tetranuclear ruthenium hydrido clusters, and to a less extent, of hexanuclear ruthenium hydrido clusters, are investigated theoretically. Some of these (H)(n)Ru(k)(L)(m) (k = 4, 6) clusters were experimentally synthesized and characterized. Non-existing structures are also considered in order to examine the role of ligands on their structure, vibrational spectra and (1)H NMR chemical shifts. The calculated properties are found in very good agreement with experimental data, when available. Beyond the intrinsic interest elicited by transition metal clusters, these compounds are also considered in this paper as relevant to diamagnetic ruthenium nanoparticles as well as building blocks of hcp surfaces, which is the ruthenium nanoparticle lattice. On the basis of the very good agreement between experiments and theory, the structural and spectroscopic properties of several model clusters are also predicted in order to bring additional data which may help to analyze the spectral signature of ruthenium nanoparticles. A particular emphasis is put on (1)H NMR, which is of high practical importance for characterizing the presence of hydrides in ruthenium clusters and nanoparticles. Several topics are discussed: the structural preference of surface hydrides for terminal-, edge-bridging or face-capping coordination modes, hydrides adsorption energies, the possible presence of interstitial hydrogen atoms, the dependence of (1)H chemical shifts on ligands and on electron counting.
Collapse
|