1
|
Golub IE, Filippov OA, Belkova NV, Epstein LM, Shubina ES. The Mechanism of Halogenation of Decahydro-closo-Decaborate Dianion by Hydrogen Chloride. RUSS J INORG CHEM+ 2021. [DOI: 10.1134/s0036023621110073] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
|
2
|
Golub IE, Gulyaeva ES, Filippov OA, Dyadchenko VP, Belkova NV, Epstein LM, Arkhipov DE, Shubina ES. Dihydrogen bond intermediated alcoholysis of dimethylamine-borane in nonaqueous media. J Phys Chem A 2015; 119:3853-68. [PMID: 25822484 DOI: 10.1021/acs.jpca.5b01921] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Dimethylamine-borane (DMAB) acid/base properties, its dihydrogen-bonded (DHB) complexes and proton transfer reaction in nonaqueous media were investigated both experimentally (IR, UV/vis, NMR, and X-ray) and theoretically (DFT, NBO, QTAIM, and NCI). The effects of DMAB concentration, solvents polarity and temperature on the degree of DMAB self-association are shown and the enthalpy of association is determined experimentally for the first time (-ΔH°assoc = 1.5-2.3 kcal/mol). The first case of "improper" (blue-shifting) NH···F hydrogen bonds was observed in fluorobenzene and perfluorobenzene solutions. It was shown that hydrogen-bonded complexes are the intermediates of proton transfer from alcohols and phenols to DMAB. The reaction mechanism was examined computationally taking into account the coordinating properties of the reaction media. The values of the rate constants of proton transfer from HFIP to DMAB in acetone were determined experimentally [(7.9 ± 0.1) × 10(-4) to (1.6 ± 0.1) × 10(-3) mol(-1)·s(-1)] at 270-310 K. Computed activation barrier of this reaction ΔG(‡theor)298 K(acetone) = 23.8 kcal/mol is in good agreement with the experimental value of the activation free energy ΔG(‡exp)270 K = 21.1 kcal/mol.
Collapse
Affiliation(s)
- Igor E Golub
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia.,‡Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119234 Moscow, Russia
| | - Ekaterina S Gulyaeva
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia.,‡Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119234 Moscow, Russia
| | - Oleg A Filippov
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| | - Victor P Dyadchenko
- ‡Department of Chemistry, M.V. Lomonosov Moscow State University, Leninskie Gory 1/3, 119234 Moscow, Russia
| | - Natalia V Belkova
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| | - Lina M Epstein
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| | - Dmitry E Arkhipov
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| | - Elena S Shubina
- †A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilova 28, 119991 Moscow, Russia
| |
Collapse
|
3
|
Belkova NV, Bakhmutova-Albert EV, Gutsul EI, Bakhmutov VI, Golub IE, Filippov OA, Epstein LM, Peruzzini M, Rossin A, Zanobini F, Shubina ES. Dihydrogen bonding in complex (PP3)RuH(η(1)-BH4) featuring two proton-accepting hydride sites: experimental and theoretical studies. Inorg Chem 2013; 53:1080-90. [PMID: 24369730 DOI: 10.1021/ic4026206] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Combining variable-temperature infrared and NMR spectroscopic studies with quantum-chemical calculations (density functional theory (DFT) and natural bond orbital) allowed us to address the problem of competition between MH (M = transition metal) and BH hydrogens as proton-accepting sites in dihydrogen bond (DHB) and to unravel the mechanism of proton transfer to complex (PP3)RuH(η(1)-BH4) (1, PP3 = κ(4)-P(CH2CH2PPh2)3). Interaction of complex 1 with CH3OH, fluorinated alcohols of variable acid strength [CH2FCH2OH, CF3CH2OH, (CF3)2CHOH (HFIP), (CF3)3COH], and CF3COOH leads to the medium-strength DHB complexes involving BH bonds (3-5 kcal/mol), whereas DHB complexes with RuH were not observed experimentally. The two proton-transfer pathways were considered in DFT/M06 calculations. The first one goes via more favorable bifurcate complexes to BHterm and high activation barriers (38.2 and 28.4 kcal/mol in case of HFIP) and leads directly to the thermodynamic product [(PP3)RuHeq(H2)](+)[OR](-). The second pathway starts from the less-favorable complex with RuH ligand but shows a lower activation barrier (23.5 kcal/mol for HFIP) and eventually leads to the final product via the isomerization of intermediate [(PP3)RuHax(H2)](+)[OR](-). The B-Hbr bond breaking is the common key step of all pathways investigated.
Collapse
Affiliation(s)
- Natalia V Belkova
- A.N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences , 28 Vavilov Street, 119991 Moscow, Russia
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Filippov OA, Belkova NV, Epstein LM, Lledos A, Shubina ES. Hydrogen–deuterium exchange in hydride chemistry: Dihydrogen bonded complexes as key intermediates. COMPUT THEOR CHEM 2012. [DOI: 10.1016/j.comptc.2012.07.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
6
|
Golub IE, Filippov OA, Gutsul EI, Belkova NV, Epstein LM, Rossin A, Peruzzini M, Shubina ES. Dimerization Mechanism of Bis(triphenylphosphine)copper(I) Tetrahydroborate: Proton Transfer via a Dihydrogen Bond. Inorg Chem 2012; 51:6486-97. [DOI: 10.1021/ic202598c] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Igor E. Golub
- A. N. Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), 28 Vavilov Street,
119991 Moscow, Russia
| | - Oleg A. Filippov
- A. N. Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), 28 Vavilov Street,
119991 Moscow, Russia
| | - Evgenii I. Gutsul
- A. N. Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), 28 Vavilov Street,
119991 Moscow, Russia
| | - Natalia V. Belkova
- A. N. Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), 28 Vavilov Street,
119991 Moscow, Russia
| | - Lina M. Epstein
- A. N. Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), 28 Vavilov Street,
119991 Moscow, Russia
| | - Andrea Rossin
- Istituto di Chimica dei Composti Organometallici Consiglio Nazionale delle Ricerche (ICCOM CNR), via Madonna del Piano 10, 50019 Sesto Fiorentino
(Florence), Italy
| | - Maurizio Peruzzini
- Istituto di Chimica dei Composti Organometallici Consiglio Nazionale delle Ricerche (ICCOM CNR), via Madonna del Piano 10, 50019 Sesto Fiorentino
(Florence), Italy
| | - Elena S. Shubina
- A. N. Nesmeyanov
Institute of Organoelement Compounds, Russian Academy of Sciences (INEOS RAS), 28 Vavilov Street,
119991 Moscow, Russia
| |
Collapse
|
7
|
Sivaev IB, Prikaznov AV, Naoufal D. Fifty years of the closo-decaborate anion chemistry. ACTA ACUST UNITED AC 2010. [DOI: 10.1135/cccc2010054] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The review covers the fifty-year period of chemistry of the closo-decaborate anion [B10H10]2– from the first report by Hawthorne and Pitochelli. The main attention is paid to reactions of substitution of various atoms and groups for hydrogen atoms. The general stability of the closo-decaborate cage, including its protonation, cage-opening and cage oxidation reactions, is considered as well. A review with 242 references.
Collapse
|