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Belkova NV, Filippov OA, Osipova ES, Safronov SV, Epstein LM, Shubina ES. Influence of phosphine (pincer) ligands on the transition metal hydrides reactivity. Coord Chem Rev 2021. [DOI: 10.1016/j.ccr.2021.213799] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Kirkina VA, Silantyev GA, De-Botton S, Filippov OA, Titova EM, Pavlov AA, Belkova NV, Epstein LM, Gelman D, Shubina ES. Stereoisomerism as an Origin of Different Reactivities of Ir(III) PC(sp 3)P Pincer Catalysts. Inorg Chem 2020; 59:11962-11975. [PMID: 32806008 DOI: 10.1021/acs.inorgchem.0c00797] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Two stereoisomers of pentacoordinate iridium(III) hydridochloride with triptycene-based PC(sp3)P pincer ligand (1,8-bis(diisopropylphosphino)triptycene), 1 and 2, differ by the orientation of hydride ligand relative to the bridgehead ring of triptycene. According to DFT/B3PW91/def2-TZVP calculations performed, an equatorial Cl ligand can relatively easily change its position in 1, whereas that is not the case in 2. Both complexes 1 and 2 readily bind the sixth ligand to protect the empty coordination site. Variable temperature spectroscopic (NMR, IR, and UV-visible) studies show the existence of two isomers of hexacoordinate complexes 1·MeCN, 2·MeCN, and 2·Py with acetonitrile or pyridine coordinated trans to hydride or trans to metalated C(sp3), whereas only the equatorial isomer is found for 1·Py. These complexes are stabilized by various intramolecular noncovalent C-H···Cl interactions that are affected by the rotation of isopropyls or pyridine. The substitution of MeCN by pyridine is slow yielding axial Py complexes as kinetic products and the equatorial Py complexes as thermodynamic products with faster reactions of 1·L. Ultimately, that explains the higher activity of 1 in the catalytic alkenes' isomerization observed for allylbenzene, 1-octene, and pent-4-enenitrile, which proceeds as an insertion/elimination sequence rather than through the allylic mechanism.
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Affiliation(s)
- Vladislava A Kirkina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
| | - Gleb A Silantyev
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
| | - Sophie De-Botton
- Institute of Chemistry, The Hebrew University, Edmond Safra Campus, Givat Ram, 91904 Jerusalem, Israel
| | - Oleg A Filippov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
| | - Ekaterina M Titova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
| | - Alexander A Pavlov
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
| | - Natalia V Belkova
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
| | - Lina M Epstein
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
| | - Dmitri Gelman
- Institute of Chemistry, The Hebrew University, Edmond Safra Campus, Givat Ram, 91904 Jerusalem, Israel
| | - Elena S Shubina
- A. N. Nesmeyanov Institute of Organoelement Compounds, Russian Academy of Sciences, Vavilov Street 28, 119991 Moscow, Russia
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Osipova ES, Filippov OA, Shubina ES, Belkova NV. Non-covalent interactions in stoichiometric and catalytic reactions of iridium pincer complexes. MENDELEEV COMMUNICATIONS 2019. [DOI: 10.1016/j.mencom.2019.03.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Osipova ES, Gulyaeva ES, Filippov OA, Safronov SV, Pavlov AA, Polukeev AV, Kirkina VA, Titova EM, Shubina ES, Belkova NV. Effect of Ligands on the Lewis Acidity of the Metal and the Binding of N‐Bases to Iridium Pincer Complexes. Eur J Inorg Chem 2019. [DOI: 10.1002/ejic.201801341] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Elena S. Osipova
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
| | - Ekaterina S. Gulyaeva
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
| | - Oleg A. Filippov
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
| | - Sergey V. Safronov
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
| | - Alexander A. Pavlov
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
| | - Alexey V. Polukeev
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
| | - Vladislava A. Kirkina
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
| | - Ekaterina M. Titova
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
- Inorganic Chemistry Department Peoples' Friendship University of Russia Miklukho‐Maklaya str. 6 117198 Moscow Russia
| | - Elena S. Shubina
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
- Inorganic Chemistry Department Peoples' Friendship University of Russia Miklukho‐Maklaya str. 6 117198 Moscow Russia
| | - Natalia V. Belkova
- A.N. Nesmeyanov Institute of Organoelement Compounds Russian Academy of Sciences Vavilov str. 28 119991 Moscow Russia
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Morris RH. Estimating the Wavenumber of Terminal Metal-Hydride Stretching Vibrations of Octahedral d6 Transition Metal Complexes. Inorg Chem 2018; 57:13809-13821. [DOI: 10.1021/acs.inorgchem.8b02314] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Robert H. Morris
- Department of Chemistry, University of Toronto, 80 Saint George St., Toronto, Ontario M5S3H6, Canada
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Affiliation(s)
- Louise M. Guard
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Travis J. Hebden
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
| | - Donald E. Linn
- Department
of Chemistry, Indiana University-Purdue University Fort Wayne, 2101 Coliseum Boulevard, East Science Building 496, Fort Wayne, Indiana 46805-1499, United States
| | - D. Michael Heinekey
- Department
of Chemistry, University of Washington, Seattle, Washington 98195-1700, United States
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Titova EM, Osipova ES, Pavlov AA, Filippov OA, Safronov SV, Shubina ES, Belkova NV. Mechanism of Dimethylamine–Borane Dehydrogenation Catalyzed by an Iridium(III) PCP-Pincer Complex. ACS Catal 2017. [DOI: 10.1021/acscatal.6b03207] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Ekaterina M. Titova
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991 Moscow, Russia
| | - Elena S. Osipova
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991 Moscow, Russia
| | - Alexander A. Pavlov
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991 Moscow, Russia
| | - Oleg A. Filippov
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991 Moscow, Russia
| | - Sergey V. Safronov
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991 Moscow, Russia
| | - Elena S. Shubina
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991 Moscow, Russia
| | - Natalia V. Belkova
- A. N. Nesmeyanov Institute of Organoelement
Compounds, Russian Academy of Sciences, Vavilov str. 28, 119991 Moscow, Russia
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