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Chipanina NN, Shainyan BA, Oznobikhina LP, Lazareva NF. The Rivalry between Intramolecular Tetrel Bonds and Intermolecular Hydrogen Bonds in (O-Si) Chelates of N-Silylmethylamides and -ureas. A Theoretical Study. Chemphyschem 2024:e202400410. [PMID: 39005005 DOI: 10.1002/cphc.202400410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2024] [Revised: 05/21/2024] [Indexed: 07/16/2024]
Abstract
The comparison of the results of theoretical calculations of (O-Si) chelates of N-silylmethylated amides and ureas with the axial chlorine or fluorine atom at silicon to the data of X-ray analysis of related compounds revealed the formation of covalent O-Si tetrel bonds (TB) or noncovalent O⋅⋅⋅Si tetrel bonds (NTB). The nature of the formed tetrel bond depends on the substituents at silicon and the polarity of the medium. The competition between the intramolecular TB and intermolecular hydrogen bonds (HB) with proton donors depends on the center of basicity involved in the formation of HB, which could be either oxygen or halogen. The hydrogen bonding can result in changing the nature of the tetrel bonds from covalent to noncovalent and vice versa by varying their lengths and energies. The O-Si bond energies estimated by QTAIM analysis of N-[(chlorodimethylsilyl)methyl]-N-methylacetamide and its H-complexes vary within the range of 7.2 and 12 kcal/mol in gas and solution, respectively, and correlate with the O-Si bond lengths.
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Affiliation(s)
- Nina N Chipanina
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Street, 664033, Irkutsk, Russian Federation
| | - Bagrat A Shainyan
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Street, 664033, Irkutsk, Russian Federation
| | - Larisa P Oznobikhina
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Street, 664033, Irkutsk, Russian Federation
| | - Nataliya F Lazareva
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Street, 664033, Irkutsk, Russian Federation
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2
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Tiede ER, Heckman MT, Brennessel WW, Kraft BM. Chelation Equilibria and π-Electron Delocalization in Neutral Hypercoordinate Organosilicon Complexes of Pyrithione. Organometallics 2022. [DOI: 10.1021/acs.organomet.2c00342] [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)
- Erin R. Tiede
- Department of Chemistry, St. John Fisher University, Rochester, New York 14618, United States
| | - Matthew T. Heckman
- Department of Chemistry, St. John Fisher University, Rochester, New York 14618, United States
| | - William W. Brennessel
- Department of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Bradley M. Kraft
- Department of Chemistry, St. John Fisher University, Rochester, New York 14618, United States
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Lazareva NF, Alekseev MA, Sterkhova IV. Structure of novel N-fluorosilylmethyl-N-isopropylureas. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.09.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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4
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Ansmann N, Hartmann D, Sailer S, Erdmann P, Maskey R, Schorpp M, Greb L. Synthesis and Characterization of Hypercoordinated Silicon Anions: Catching Intermediates of Lewis Base Catalysis. Angew Chem Int Ed Engl 2022; 61:e202203947. [PMID: 35438836 PMCID: PMC9325378 DOI: 10.1002/anie.202203947] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Indexed: 11/24/2022]
Abstract
Anionic hypercoordinated silicates with weak donors were proposed as key intermediates in numerous silicon‐based reactions. However, their short‐lived nature rendered even spectroscopic observations highly challenging. Here, we characterize hypercoordinated silicon anions, including the first bromido‐, iodido‐, formato‐, acetato‐, triflato‐ and sulfato‐silicates. This is enabled by a new, donor‐free polymeric form of Lewis superacidic bis(perchlorocatecholato)silane 1. Spectroscopic, structural, and computational insights allow a reassessment of Gutmann's empirical rules for the role of silicon hypercoordination in synthesis and catalysis. The electronic perturbations of 1 exerted on the bound anions indicate pronounced substrate activation.
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Affiliation(s)
- Nils Ansmann
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Deborah Hartmann
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Sonja Sailer
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Philipp Erdmann
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Rezisha Maskey
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Marcel Schorpp
- Anorganisch-Chemisches Institut, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, 69120, Heidelberg, Germany
| | - Lutz Greb
- Department of Chemistry and Biochemistry-Inorganic Chemistry, Freie Universität Berlin, Fabeckstr. 34/36, 14195, Berlin, Germany
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Ansmann N, Hartmann D, Sailer S, Erdmann P, Maskey R, Schorpp M, Greb L. Synthesis and Characterization of Hypercoordinated Silicon Anions: Catching Intermediates of Lewis Base Catalysis. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202203947] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Nils Ansmann
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Deborah Hartmann
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Sonja Sailer
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Philipp Erdmann
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Rezisha Maskey
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Marcel Schorpp
- Anorganisch-Chemisches Institut Ruprecht-Karls-Universität Heidelberg Im Neuenheimer Feld 270 69120 Heidelberg Germany
| | - Lutz Greb
- Department of Chemistry and Biochemistry-Inorganic Chemistry Freie Universität Berlin Fabeckstr. 34/36 14195 Berlin Germany
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6
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(O-Si)-Chelate acetic and benzoic acid N-(fluorosilylmethyl)amides: synthesis and structure. Russ Chem Bull 2022. [DOI: 10.1007/s11172-022-3419-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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7
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Belyaeva VV, Bolgova YI, Trofimova OM. Hypervalent Intramolecular N→Si Interaction in [Methoxy(methyl)silyl] Derivatives of 8-Mercaptoquinoline: Structural and Spectral Criteria. RUSS J GEN CHEM+ 2022. [DOI: 10.1134/s1070363222020116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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8
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(Trifluorosilyl)methyl 2-methylacrylate: Synthesis, experimental and theoretical studies. J Organomet Chem 2022. [DOI: 10.1016/j.jorganchem.2021.122210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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9
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Nikolin AA, Korlyukov AA, Kramarova EP, Romanenko AR, Arkhipov DE, Tarasenko DV, Bylikin SY, Baukov YI, Negrebetsky VV. Synthesis and structure of (O → Si)-chelate fluorosilane, a novel complex of pentacoordinate silicon with N-acetylvaline. MENDELEEV COMMUNICATIONS 2022. [DOI: 10.1016/j.mencom.2022.01.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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10
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Soldatenko AS, Sterkhova IV, Lazareva NF. N-[(Trifluorosilyl)methyl]carboxanilides: Synthesis and structural features. J Organomet Chem 2021. [DOI: 10.1016/j.jorganchem.2021.121788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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11
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Belogolova EF, Shlykov SA, Eroshin AV, Doronina EP, Sidorkin VF. The hierarchy of ab initio and DFT methods for describing an intramolecular non-covalent SiN contact in the silicon compounds using electron diffraction geometries. Phys Chem Chem Phys 2021; 23:2762-2774. [PMID: 33496285 DOI: 10.1039/d0cp05872f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
In the series of silatranes XSi(OCH2CH2)3N, 1 (X = Me, 1a; H, 1b; F, 1c) with the known gas electron diffraction (GED) structures, the problematic geometry of 1-methylsilatrane 1a has been revised. In particular, the new value of the SiN distance (dSiN) in 1a turned out to be ∼0.06 Å longer than the generally accepted one. This dSiN resolves the long-standing contradiction between the data of the structural and spectral experiments regarding the sensitivity of 1 to the medium effect. We also performed the ab initio and DFT study of the combined series of silatranes 1a-c, silylalkylamines H3Si(CH2)3NMe2 (2a) and F3SiCH2NMe2 (2b), silylhydrazines F3SiN(Me)NMe2 (2c) and F3SiN(SiMe3)NMe2 (2d), and silyloxyamines ClH2SiONMe2 (2e,f), (F3C)F2SiONMe2 (2g,h) and F3SiONMe2 (2i), in which the GED dSiN values are in a wide range of 2-3 Å. None of the involved quantum chemical methods has succeeded in reproducing all the experimental gas-phase dSiN values in 1a-c, 2a-i with an acceptable accuracy (0.01-0.03 Å). The problems of the used methods, primarily CCSD with the Pople basis sets, are caused by four molecules with the geminal SiNN and SiON fragments (2d,f-i) and dSiN < 2.3 Å. A reasonable hierarchy of computationally accessible theory levels for studying the physicochemical manifestation of the non-covalent intramolecular SiN interactions can be constructed only at dSiN > 2.3 Å: MP2 < PBE0 ∼ B3PW91 ∼ SCS-MP2 < CCSD < CCSD(T).
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Affiliation(s)
- Elena F Belogolova
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Street, 664033 Irkutsk, Russian Federation.
| | - Sergey A Shlykov
- Ivanovo State University of Chemistry and Technology, Sheremetievskiy ave. 7, 153000 Ivanovo, Russian Federation.
| | - Alexey V Eroshin
- Ivanovo State University of Chemistry and Technology, Sheremetievskiy ave. 7, 153000 Ivanovo, Russian Federation.
| | - Evgeniya P Doronina
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Street, 664033 Irkutsk, Russian Federation.
| | - Valery F Sidorkin
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, 1 Favorsky Street, 664033 Irkutsk, Russian Federation.
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12
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Lazareva NF, Sterkhova IV, Vashchenko AV. N-[difluoro(methyl)silyl]carboxamides: Synthesis, structural features and theoretical estimating of Si←O dative bond energy. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.129130] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Laser induced dielectric breakdown for synthesis of chlorofluorosilanes. J Fluor Chem 2021. [DOI: 10.1016/j.jfluchem.2020.109692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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14
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Feshin VP, Feshina EV. Structure of the SiCl4←O=C[N(CH3)2]2 Complex and Electron Density Redistribution upon Its Formation according to ab initio Calculations. RUSS J INORG CHEM+ 2019. [DOI: 10.1134/s0036023619090110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Nikolin AA, Korlyukov AA, Kramarova EP, Arkhipov DE, Shipov AG, Baukov YI, Negrebetskii VV. Synthesis and structure of new anionic five-coordinate silicon complexes derived from α-hydroxy acids and 1-methylpiperazine-2,5-dione. Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2595-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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16
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Chipanina NN, Lazareva NF, Oznobikhina LP, Shainyan BA. Tetrel Bonding along the Pathways of Transsilylation and Alkylation of N-Trimethylsilyl-N-methylacetamide with Bifunctional (Chloromethyl)fluorosilanes. J Phys Chem A 2019; 123:5178-5189. [DOI: 10.1021/acs.jpca.9b03876] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Nina N. Chipanina
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Street, 664033 Irkutsk, Russian Federation
| | - Nataliya F. Lazareva
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Street, 664033 Irkutsk, Russian Federation
| | - Larisa P. Oznobikhina
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Street, 664033 Irkutsk, Russian Federation
| | - Bagrat A. Shainyan
- A.E. Favorsky Irkutsk Institute of Chemistry, Siberian Division of the Russian Academy of Sciences, 1 Favorsky Street, 664033 Irkutsk, Russian Federation
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17
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Korlyukov AA, Arkhipov DE, Volodin AD, Negrebetskii VV, Nikolin AA, Kramarova EP, Shipov AG, Baukov YI. Mono-C,O-chelated bromo- and triflatosilanes with an amino acid moiety: salts or covalently bonded complexes? Russ Chem Bull 2019. [DOI: 10.1007/s11172-019-2429-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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18
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Negrebetsky VV, Kramarova EP, Shipov AG, Baukov YI, Korlyukov AA, Arkhipov DE, Bassindale AR, Taylor PG, Bylikin SY. Synthesis, structures and stereodynamic behavior of pentacoordinate (O→Si)-Chelate Difluoro(methyl)silylmethyl derivatives of amides and imides. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.07.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Nikolin AA, Korlyukov AA, Kramarova EP, Arkhipov DE, Shipov AG, Baukov YI, Negrebetsky VV. Synthesis and structural features of new pentacoordinated monofluorosilanes containing C,O-chelate ligands based on 2-amino acid N-methylamides. Russ Chem Bull 2018. [DOI: 10.1007/s11172-018-2215-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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20
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Transsilylation of O-trimethylsilyl derivatives of α-dimethylaminoketones by chloro(chloromethyl)dimethylsilane. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.01.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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21
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Konovalov AI, Antipin IS, Burilov VA, Madzhidov TI, Kurbangalieva AR, Nemtarev AV, Solovieva SE, Stoikov II, Mamedov VA, Zakharova LY, Gavrilova EL, Sinyashin OG, Balova IA, Vasilyev AV, Zenkevich IG, Krasavin MY, Kuznetsov MA, Molchanov AP, Novikov MS, Nikolaev VA, Rodina LL, Khlebnikov AF, Beletskaya IP, Vatsadze SZ, Gromov SP, Zyk NV, Lebedev AT, Lemenovskii DA, Petrosyan VS, Nenaidenko VG, Negrebetskii VV, Baukov YI, Shmigol’ TA, Korlyukov AA, Tikhomirov AS, Shchekotikhin AE, Traven’ VF, Voskresenskii LG, Zubkov FI, Golubchikov OA, Semeikin AS, Berezin DB, Stuzhin PA, Filimonov VD, Krasnokutskaya EA, Fedorov AY, Nyuchev AV, Orlov VY, Begunov RS, Rusakov AI, Kolobov AV, Kofanov ER, Fedotova OV, Egorova AY, Charushin VN, Chupakhin ON, Klimochkin YN, Osyanin VA, Reznikov AN, Fisyuk AS, Sagitullina GP, Aksenov AV, Aksenov NA, Grachev MK, Maslennikova VI, Koroteev MP, Brel’ AK, Lisina SV, Medvedeva SM, Shikhaliev KS, Suboch GA, Tovbis MS, Mironovich LM, Ivanov SM, Kurbatov SV, Kletskii ME, Burov ON, Kobrakov KI, Kuznetsov DN. Modern Trends of Organic Chemistry in Russian Universities. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2018. [DOI: 10.1134/s107042801802001x] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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23
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Doronina EP, Sidorkin VF, Belogolova EF, Jouikov V. Hypervalent benzophenones. J Organomet Chem 2018. [DOI: 10.1016/j.jorganchem.2018.01.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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24
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Synthesis and structure of the first representative of pentacoordinate C,O-chelates with a dipeptide fragment, the fluorosilane Ts—Gly—(S)-Pro—N(Me)CH2SiMe2F. Russ Chem Bull 2017. [DOI: 10.1007/s11172-017-1774-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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25
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Lazareva NF, Lazarev IМ. Reaction of transsilylation of N-methyl-N-trimethylsilylacetamide with silanes ClCH2SiR1R2Cl. RUSS J GEN CHEM+ 2017. [DOI: 10.1134/s107036321708014x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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26
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Koch JG, Brennessel WW, Kraft BM. Neutral and Cationic Bis-Chelate Monoorganosilicon(IV) Complexes of 1-Hydroxy-2-pyridinone. Organometallics 2017. [DOI: 10.1021/acs.organomet.6b00796] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - William W. Brennessel
- Department
of Chemistry, University of Rochester, Rochester, New York 14627, United States
| | - Bradley M. Kraft
- Department
of Chemistry, St. John Fisher College, Rochester, New York 14618, United States
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27
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Green MLH, Parkin G. The classification and representation of main group element compounds that feature three-center four-electron interactions. Dalton Trans 2016; 45:18784-18795. [PMID: 27845802 DOI: 10.1039/c6dt03570a] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This article provides a means to classify and represent compounds that feature 3-center 4-electron (3c-4e) interactions in terms of the number of electrons that each atom contributes to the interaction. Specifically, Class I 3c-4e interactions are classified as those in which two atoms provide one electron each and the third atom provides a pair of electrons (i.e. LX2), while Class II 3c-4e interactions are classified as those in which two atoms each provide a pair of electrons and the third atom contributes none (i.e. L2Z). These classes can be subcategorized according to the nature of the central atom. Thus, Class I interactions can be categorized according to whether the central atom provides one (i.e.μ-X) or two (i.e.μ-L) electrons, while Class II interactions can be categorized according to whether the central atom provides none (i.e.μ-Z) or two (i.e.μ-L) electrons. The use of appropriate structure-bonding representations for these various interactions provides a means to determine the covalent bond classification of the element of interest.
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Affiliation(s)
- Malcolm L H Green
- Inorganic Chemistry Laboratory, South Parks Road, Oxford, UK OX1 3QR.
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28
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Lazareva NF, Chipanina NN, Oznobikhina LP, Shainyan BA. Two competitive routes and the mechanism of trans-silylation of N-trimethylsilyl-N-methylacetamide: Quantum chemical and FTIR study. J Organomet Chem 2016. [DOI: 10.1016/j.jorganchem.2016.09.028] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Gostevskii BA, Albanov AI, Vashchenko AV, Smirnov VI. Synthesis of 1-organyl-1-(trimethylsiloxy)-2-(dimethylamino)ethenes and new hypervalent silicon compounds based thereon. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2016. [DOI: 10.1134/s107042801610002x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Aksamentova TN, Chipanina NN, Grebneva EA, Timofeeva EN, Bolgova YI, Trofimova OM. DFT study of the 1-aryl-1-fluoro-5-methylquasisilatrane stereoisomers. NBO and QTAIM analysis. COMPUT THEOR CHEM 2016. [DOI: 10.1016/j.comptc.2016.07.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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31
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Nikolin AA, Kramarova EP, Shipov AG, Baukov YI, Negrebetsky VV, Arkhipov DE, Korlyukov AA, Lagunin AA, Bylikin SY, Bassindale AR, Taylor PG. N,N-Bis-(dimethylfluorosilylmethyl)amides of N-organosulfonylproline and sarcosine: synthesis, structure, stereodynamic behaviour and in silico studies. RSC Adv 2016. [DOI: 10.1039/c6ra14450k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
(O→Si)-Chelate difluorides R3R2NCH(R1)C(O)N(CH2SiMe2F)2, were synthesized by silylmethylation of amides R3R2NCH(R1)C(O)NH2, subsequent hydrolysis of unstable dichlorides into 2,6-disilamorpholines and the reaction of the latter compounds with BF3·Et2O.
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Affiliation(s)
- Alexey A. Nikolin
- Department of Chemistry
- N.I. Pirogov Russian National Research Medical University
- Moscow 117997
- Russian Federation
| | - Eugenia P. Kramarova
- Department of Chemistry
- N.I. Pirogov Russian National Research Medical University
- Moscow 117997
- Russian Federation
| | - Alexander G. Shipov
- Department of Chemistry
- N.I. Pirogov Russian National Research Medical University
- Moscow 117997
- Russian Federation
| | - Yuri I. Baukov
- Department of Chemistry
- N.I. Pirogov Russian National Research Medical University
- Moscow 117997
- Russian Federation
| | - Vadim V. Negrebetsky
- Department of Chemistry
- N.I. Pirogov Russian National Research Medical University
- Moscow 117997
- Russian Federation
| | - Dmitry E. Arkhipov
- A. N. Nesmeyanov's Institute of Organoelement Compounds
- 119991 Moscow
- Russian Federation
| | | | - Alexey A. Lagunin
- Department of Bioinformatics
- N.I. Pirogov Russian National Research Medical University
- Moscow 117997
- Russian Federation
- Institute of Biomedical Chemistry
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Synthesis, structure, and stereochemical non-rigidity of bis[(2,2-dimethyl-4-oxo-2H-benzo[e][1,3]oxazin-3(4H)-yl)methyl] dichlorosilane and -germane. Russ Chem Bull 2015. [DOI: 10.1007/s11172-015-1075-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Doronina EP, Sidorkin VF, Lazareva NF. Analysis of the hypersensitivity of the (29)Si NMR chemical shift of the pentacoordinate silicon compounds to the temperature effect. N-(Silylmethyl)acetamides. J Phys Chem A 2015; 119:3663-73. [PMID: 25803817 DOI: 10.1021/acs.jpca.5b01746] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Theoretical investigation of the phenomenon of hypersensitivity of the (29)Si NMR chemical shift, δ, in the pentacoordinate silicon compounds to the temperature effect has been performed by the example of N-(silylmethyl)acetamides MeC(O)NMeCH2SiX3 (X = Me, 1; OMe, 2; F, 3) and MeC(O)NMeCH2SiMe2F (4) with the use of experimental dynamic NMR (DNMR) (29)Si data. It is based on the following: (i) the analysis of the potential energy surface of molecules 1-4 in polar solvents and the energetics of interconversion between their possible isomeric forms; (ii) the calculations of δ at different temperatures taking into account the dependence of the dielectric constant (ε) of the medium on T, and (iii) the isolation of dynamic, geometrical, and polar contributions to the temperature drift of δ. The results obtained allowed us to give a consistent explanation of the DNMR (29)Si spectra of acetamides 1-4 and to elucidate the nature of an unusual effect of T on δ.
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Affiliation(s)
- Evgeniya P Doronina
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky, 1, Irkutsk 664033, Russian Federation
| | - Valery F Sidorkin
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky, 1, Irkutsk 664033, Russian Federation
| | - Nataliya F Lazareva
- A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences, Favorsky, 1, Irkutsk 664033, Russian Federation
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