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Pomogaeva AV, Lisovenko AS, Timoshkin AY. Structures and stability of I 2 and ICl complexes with pyridine: Ab initio and DFT study. J Comput Chem 2024; 45:903-914. [PMID: 38165152 DOI: 10.1002/jcc.27300] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 11/30/2023] [Accepted: 12/02/2023] [Indexed: 01/03/2024]
Abstract
Theoretical investigation of thermodynamic stability and bonding features of possible isomers of the molecular and ionic complexes of pyridine with molecular iodine and iodine monochloride IX (X = I,Cl) is presented. M06-2X DFT functional is found to provide bond distances and dissociation energies which are close to those obtained at high-level ab initio CCSD(T)/aug-cc-pvtz//CCSD/aug-cc-pvtz benchmark computations for the most stable isomers, formed via donation of a lone pair of nitrogen atom of pyridine to the iodine atom. These isomers are by 23-33 kJ mol-1 (in case of I2) and by 39-56 kJ mol-1 (in case of ICl) more stable than other molecular complexes. T-shaped π-σ* bonded isomers turn out to be energetically comparable with van der Waals bound compounds. Among the ionic isomers, structures featuring [IPy2]+ cation with I3 - or ICl2 - counterions are more stable. Oligomerization favors ionic isomers starting from the tetrameric clusters of the composition (IX)4Py4.
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Affiliation(s)
- Anna V Pomogaeva
- Institute of Chemistry, Saint Petersburg State University, St. Petersburg, Russia
| | - Anna S Lisovenko
- Institute of Chemistry, Saint Petersburg State University, St. Petersburg, Russia
| | - Alexey Y Timoshkin
- Institute of Chemistry, Saint Petersburg State University, St. Petersburg, Russia
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2
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Pomogaeva AV, Lisovenko AS, Zavgorodnii AS, Timoshkin AY. Lewis acid stabilized group 13-15 element analogs of ethylene. J Comput Chem 2023; 44:218-228. [PMID: 35435275 DOI: 10.1002/jcc.26867] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2021] [Revised: 03/05/2022] [Accepted: 03/16/2022] [Indexed: 12/31/2022]
Abstract
Stabilization of hydrogen-substituted group 13-15 compounds H2 EE'H2 (E = B, Al, Ga; E' = P, As, Sb) by Lewis acids is considered at B3LYP/def2-TZVP, B3LYP-D3/def2-TZVP and M06-2X/def2-TZVP levels of theory. It is shown, that for many Lewis acids additional reactivity beyond the DA complex formation with H2 EE'H2 monomer is expected. In case of complexation with E(C6 F5 )3 , F/H exchange reactions with group 13 bound hydrides are predicted to be exothermic and accompanied by the activation energies which are smaller than dissociation of the complex into components. In case of complex formation with transition metal (TM) carbonyls, additional O → Al, TM-C → Al interactions are observed, which in several cases lead to cyclic structures. The most promising candidates for the experimental studies have been identified. Synthetic approaches to the most promising LA-only stabilized compounds are recommended.
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Affiliation(s)
- Anna V Pomogaeva
- Institute of Chemistry, Saint Petersburg State University, St. Petersburg, Russia
| | - Anna S Lisovenko
- Institute of Chemistry, Saint Petersburg State University, St. Petersburg, Russia
| | - Artem S Zavgorodnii
- Institute of Chemistry, Saint Petersburg State University, St. Petersburg, Russia
| | - Alexey Y Timoshkin
- Institute of Chemistry, Saint Petersburg State University, St. Petersburg, Russia
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3
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Shcherbina NA, Kazakov IV, Lisovenko AS, Kryukova MA, Krasnova IS, Bodensteiner M, Timoshkin AY. Molecular complexes of non-chelating polydentate Lewis bases with group 13 Lewis acids: crystal structure and computed energy of stepwise donor–acceptor bond formation. Mendeleev Communications 2022. [DOI: 10.1016/j.mencom.2022.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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4
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Davydova EI, Virovets A, Peresypkina E, Pomogaeva AV, Lisovenko AS, Timoshkin AY. Unusual molecular complexes of antimony fluoride dimers with acetonitrile and pyridine: structures and bonding. Dalton Trans 2021; 50:13357-13367. [PMID: 34608911 DOI: 10.1039/d1dt02412d] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
The structures of two new molecular complexes of antimony pentafluoride with pyridine (Py) and acetonitrile (AN), SbF5·Py and Sb2F10·AN, and a molecular complex of antimony trifluoride Sb2F6·Py and its ionic derivative [HPy]+[Sb2F7]- in the solid state have been determined by single crystal X-ray structural analysis. The complexes Sb2F10·AN and Sb2F6·Py are the first structurally characterized compounds of dimeric antimony fluorides. To reveal the nature of bonding in the complexes and their stability, DFT computations of the electronic structure and thermodynamic characteristics were performed, in particular the analysis of the electrostatic potentials, the orbital interactions and the topology. The results indicate that the intermolecular Sb⋯F interactions can be described as a network of pnictogen bonds.
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Affiliation(s)
- Elena I Davydova
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya emb. 7/9, 199034, St Petersburg, Russia.
| | - Alexander Virovets
- University of Regensburg, Universitaetsstr. 31, 93053 Regensburg, Germany
| | | | - Anna V Pomogaeva
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya emb. 7/9, 199034, St Petersburg, Russia.
| | - Anna S Lisovenko
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya emb. 7/9, 199034, St Petersburg, Russia.
| | - Alexey Y Timoshkin
- Institute of Chemistry, Saint Petersburg State University, Universitetskaya emb. 7/9, 199034, St Petersburg, Russia.
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5
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Kazakov IV, Lisovenko AS, Shcherbina NA, Kornyakov IV, Gugin NY, Kondrat'ev YV, Chernysheva AM, Zavgorodnii AS, Timoshkin AY. Structural and Energetic Features of Group 13 Element Trispentafluorophenyl Complexes with Diethyl Ether. Eur J Inorg Chem 2020. [DOI: 10.1002/ejic.202000815] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Igor V. Kazakov
- Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
| | - Anna S. Lisovenko
- Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
| | - Nadezhda A. Shcherbina
- Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
| | - Ilya V. Kornyakov
- Institute of Earth Sciences St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
| | - Nikita Y. Gugin
- Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
| | - Yurii V. Kondrat'ev
- Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
| | - Anna M. Chernysheva
- Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
| | - Artem S. Zavgorodnii
- Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
| | - Alexey Y. Timoshkin
- Institute of Chemistry St. Petersburg State University Universitetskaya emb. 7/9 199034 St. Petersburg Russia
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6
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Shcherbina NA, Pomogaeva AV, Lisovenko AS, Kazakov IV, Gugin NY, Khoroshilova OV, Kondrat'ev YV, Timoshkin AY. Structures and Stability of Complexes of E(C
6
F
5
)
3
(E = B, Al, Ga, In) with Acetonitrile. Z Anorg Allg Chem 2020. [DOI: 10.1002/zaac.202000030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Nadezhda A. Shcherbina
- Department of Inorganic Chemistry St. Petersburg State University Universitetskaya emb. 7–9 199034 St. Petersburg Russia
| | - Anna V. Pomogaeva
- Department of Inorganic Chemistry St. Petersburg State University Universitetskaya emb. 7–9 199034 St. Petersburg Russia
| | - Anna S. Lisovenko
- Department of Inorganic Chemistry St. Petersburg State University Universitetskaya emb. 7–9 199034 St. Petersburg Russia
| | - Igor V. Kazakov
- Department of Inorganic Chemistry St. Petersburg State University Universitetskaya emb. 7–9 199034 St. Petersburg Russia
| | - Nikita Yu. Gugin
- Department of Inorganic Chemistry St. Petersburg State University Universitetskaya emb. 7–9 199034 St. Petersburg Russia
| | - Olesya V. Khoroshilova
- Department of Inorganic Chemistry St. Petersburg State University Universitetskaya emb. 7–9 199034 St. Petersburg Russia
| | - Yuri V. Kondrat'ev
- Department of Inorganic Chemistry St. Petersburg State University Universitetskaya emb. 7–9 199034 St. Petersburg Russia
| | - Alexey Y. Timoshkin
- Department of Inorganic Chemistry St. Petersburg State University Universitetskaya emb. 7–9 199034 St. Petersburg Russia
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7
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Affiliation(s)
| | - Anna S. Lisovenko
- Institut für Chemie Staatliche Universität St. Petersburg Universitetskaya emb. 7/9 199034 St. Petersburg Russland
| | - Alexey Y. Timoshkin
- Institut für Chemie Staatliche Universität St. Petersburg Universitetskaya emb. 7/9 199034 St. Petersburg Russland
| | - Manfred Scheer
- Institut für Anorganische Chemie Universität Regensburg 93040 Regensburg Deutschland
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Weinhart MAK, Lisovenko AS, Timoshkin AY, Scheer M. Phosphanylalanes and Phosphanylgallanes Stabilized only by a Lewis Base. Angew Chem Int Ed Engl 2020; 59:5541-5545. [PMID: 31815355 PMCID: PMC7155101 DOI: 10.1002/anie.201914046] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Indexed: 11/23/2022]
Abstract
The synthesis and characterization of the first parent phosphanylalane and phosphanylgallane stabilized only by a Lewis base (LB) are reported. The corresponding substituted compounds, such as IDipp⋅GaH2 PCy2 (1) (IDipp=1,3-bis(2,6-diisopropylphenyl)-imidazolin-2-ylidene) were obtained by the reaction of LiPCy2 with IDipp⋅GaH2 Cl. However, the LB-stabilized parent compounds IDipp⋅GaH2 PH2 (3) and IDipp⋅AlH2 PH2 (4) were prepared via a salt metathesis of LiPH2 ⋅DME with IDipp⋅E'H2 Cl (E'=Ga, Al) or by H2 -elimination reactions of IDipp⋅E'H3 (E'=Ga, Al) and PH3 , respectively. The compounds could be isolated as crystalline solids and completely characterized. Supporting DFT computations gave insight into the reaction pathways as well as into the stability of these compounds with respect to their decomposition behavior.
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Affiliation(s)
| | - Anna S. Lisovenko
- Institute of ChemistrySaint Petersburg State UniversityUniversitetskaya emb. 7/9199034St. PetersburgRussia
| | - Alexey Y. Timoshkin
- Institute of ChemistrySaint Petersburg State UniversityUniversitetskaya emb. 7/9199034St. PetersburgRussia
| | - Manfred Scheer
- Institut für Anorganische ChemieUniversität Regensburg93040RegensburgGermany
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Davydova EI, Lisovenko AS, Timoshkin AY. Complex beryllium amidoboranes: Structures, stability, and evaluation of their potential as hydrogen storage materials. J Comput Chem 2016; 38:401-405. [DOI: 10.1002/jcc.24681] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 11/12/2016] [Accepted: 11/14/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Elena I. Davydova
- Department of Inorganic Chemistry; Institute of Chemistry, Saint-Petersburg State University; Universitetskaya nab. 7/9 St. Petersburg Russian Federation 199034
| | - Anna S. Lisovenko
- Department of Inorganic Chemistry; Institute of Chemistry, Saint-Petersburg State University; Universitetskaya nab. 7/9 St. Petersburg Russian Federation 199034
| | - Alexey Y. Timoshkin
- Department of Inorganic Chemistry; Institute of Chemistry, Saint-Petersburg State University; Universitetskaya nab. 7/9 St. Petersburg Russian Federation 199034
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Lisovenko AS, Timoshkin AY. Formation and Unimolecular Dehydrogenation of Gaseous Alkaline-earth Metal AmidoboranesM(NH2BH3)2(M= Be - Ba): Comparative Computational Study. Z Anorg Allg Chem 2016. [DOI: 10.1002/zaac.201600357] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Anna S. Lisovenko
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 7/9 199034 St. Petersburg Russia
| | - Alexey Y. Timoshkin
- Institute of Chemistry; Saint Petersburg State University; Universitetskaya nab. 7/9 199034 St. Petersburg Russia
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11
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Timoshkin AY, Lisovenko AS, Doinikov DA, Kazakov IV, Zavgorodnii AS. Donor–acceptor complexes of inorganic analogs of benzene. PHOSPHORUS SULFUR 2016. [DOI: 10.1080/10426507.2015.1128913] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- Alexey Y. Timoshkin
- Department of Inorganic Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Anna S. Lisovenko
- Department of Inorganic Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Dmitry A. Doinikov
- Department of Inorganic Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Igor V. Kazakov
- Department of Inorganic Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
| | - Artem S. Zavgorodnii
- Department of Inorganic Chemistry, Institute of Chemistry, St. Petersburg State University, St. Petersburg, Russia
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12
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Lisovenko AS, Timoshkin AY. Comparative Computational Studies of Gaseous Alkali Metal AmidoboranesMNH2BH3and their Carbon AnalogsMC2H5(M= Li - Cs): Formation and Unimolecular Hydrogen Evolution. Z Anorg Allg Chem 2015. [DOI: 10.1002/zaac.201500714] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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13
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Affiliation(s)
- Anna S. Lisovenko
- Inorganic
Chemistry Group, Institute of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St. Petersburg, 198504, Russia
| | - Keiji Morokuma
- Fukui
Institute for Fundamental Chemistry, Kyoto University, 34-4 Takano
Nishihiraki-cho, Kyoto 606-8103, Japan
| | - Alexey Y. Timoshkin
- Inorganic
Chemistry Group, Institute of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St. Petersburg, 198504, Russia
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14
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Kazakov IV, Bodensteiner M, Lisovenko AS, Suvorov AV, Scheer M, Balázs G, Timoshkin AY. Structures and Stability of Molecular InBr3Pyx (x = 1–3) Complexes: Unexpected Solid State Stabilization of Dimeric In2Br6Py4 As Compared to Valence-Isoelectronic Group 15 and 17 Halogen Bridging Dimers. Inorg Chem 2013; 52:13207-15. [DOI: 10.1021/ic402162d] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Igor V. Kazakov
- Inorganic Chemistry
Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St. Petersburg 198504, Russia
| | - Michael Bodensteiner
- Department
of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Anna S. Lisovenko
- Inorganic Chemistry
Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St. Petersburg 198504, Russia
| | - Andrew V. Suvorov
- Inorganic Chemistry
Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St. Petersburg 198504, Russia
| | - Manfred Scheer
- Department
of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Gábor Balázs
- Department
of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Alexey Y. Timoshkin
- Inorganic Chemistry
Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St. Petersburg 198504, Russia
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15
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Sevastianova TN, Bodensteiner M, Lisovenko AS, Davydova EI, Scheer M, Susliakova TV, Krasnova IS, Timoshkin AY. Structural and thermodynamic properties of molecular complexes of aluminum and gallium trihalides with bifunctional donor pyrazine: decisive role of Lewis acidity in 1D polymer formation. Dalton Trans 2013; 42:11589-99. [DOI: 10.1039/c3dt50954k] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Timoshkin AY, Bodensteiner M, Sevastianova TN, Lisovenko AS, Davydova EI, Scheer M, Graßl C, Butlak AV. Do Solid-State Structures Reflect Lewis Acidity Trends of Heavier Group 13 Trihalides? Experimental and Theoretical Case Study. Inorg Chem 2012; 51:11602-11. [DOI: 10.1021/ic301507c] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Alexey Y. Timoshkin
- Inorganic Chemistry Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St.
Petersburg 198504, Russia
| | - Michael Bodensteiner
- Department of Inorganic
Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Tatiana N. Sevastianova
- Inorganic Chemistry Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St.
Petersburg 198504, Russia
| | - Anna S. Lisovenko
- Inorganic Chemistry Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St.
Petersburg 198504, Russia
| | - Elena I. Davydova
- Inorganic Chemistry Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St.
Petersburg 198504, Russia
| | - Manfred Scheer
- Department of Inorganic
Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Christian Graßl
- Department of Inorganic
Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Alina V. Butlak
- Inorganic Chemistry Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, St.
Petersburg 198504, Russia
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17
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Timoshkin AY, Kazakov IV, Lisovenko AS, Bodensteiner M, Scheer M. Fast H/D Exchange of B,B′,B″-Tribromoborazine in C6D6 in the Presence of Aluminum Tribromide: First Evidence for an Electrophilic Substitution Reaction of Borazines in Solution. Inorg Chem 2011; 50:9039-44. [DOI: 10.1021/ic201240h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Alexey Y. Timoshkin
- Inorganic Chemistry Group, Department of Chemistry, Saint Petersburg State University, University Pr. 26, Old Peterhof, 198504, Russia
| | - Igor V. Kazakov
- Inorganic Chemistry Group, Department of Chemistry, Saint Petersburg State University, University Pr. 26, Old Peterhof, 198504, Russia
| | - Anna S. Lisovenko
- Inorganic Chemistry Group, Department of Chemistry, Saint Petersburg State University, University Pr. 26, Old Peterhof, 198504, Russia
| | - Michael Bodensteiner
- Department of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
| | - Manfred Scheer
- Department of Inorganic Chemistry, University of Regensburg, 93040 Regensburg, Germany
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Abstract
Donor-acceptor complexes of borazine (BZ) and its substituted derivatives with Lewis acids (A = MCl(3), MBr(3); M = B, Al, Ga) and Lewis bases (D = NH(3), Py) have been theoretically studied at the B3LYP/TZVP level of theory. The calculations showed that complexes with Lewis bases only are unstable with respect to dissociation into their components, while complexes with Lewis acids only (such as aluminum and gallium trihalides) are stable. It was shown that formation of ternary D→BZ→A complexes may be achieved by subsequent introduction of the Lewis acid (acceptor A) and the Lewis base (donor D) to borazine. The nature of substituents in the borazine ring, their number, and position were shown to have only minor influence on the stability of ternary D→BZ→A complexes due to the compensation effect. Much weaker acceptor properties of borazine are explained in terms of large endothermic pyramidalization energy of the boron center in the borazine ring. In contrast to borazine, binary complexes of the isoelectronic benzene were predicted to be weakly bound even in the case of very strong Lewis acids; ternary DA complexes of benzene were predicted to be unbound. The donor-acceptor complex formation was predicted to significantly reduce both the endothermicity (by 70-95 kJ mol(-1)) and the activation energy (by 40-70 kJ mol(-1)) for the borazine hydrogenation. Thus, activation of the borazine ring by Lewis acids may be a facile way for the hydrogenation of borazines and polyborazines.
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Affiliation(s)
- Anna S Lisovenko
- Inorganic Chemistry Group, Department of Chemistry, St. Petersburg State University, University Pr. 26, Old Peterhof, 198504, Russia
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Volkoboĭ MF, Savchuk DI, Lisovenko AS. [On the prevention of arthrosis in bulls]. Veterinariia 1966; 43:73-4. [PMID: 6011742] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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