992-94-9Relevant articles and documents
Bellama,Morrison
, p. 985 (1975)
Experimental and Theoretical Study of the Spin-Spin Coupling Tensors in Methylsilane
Kaski, Jaakko,Lantto, Perttu,Rantala, Tapio T.,Schroderus, Jyrki,Vaara, Juha,Jokisaari, Jukka
, p. 9669 - 9677 (1999)
The experimental and theoretical 13C-29Si spin-spin coupling tensors, 1JCSi, are reported for methylsilane, 13CH329SiH3. The experiments are performed by applying the liquid crystal NMR (LC NMR) method. The data obtained by dissolving CH3SiH3 in nematic phases of two LC's is analyzed by taking into account harmonic and anharmonic vibrations, internal rotation, and solvent-induced anisotropic deformation of the molecule. The necessary parameters describing the relaxation of the molecular geometry during the internal rotation, as well as the harmonic force field, are produced theoretically with semiempirical (AM1 and PM3) and ab initio (MP2) calculations. A quantum mechanical approach has been taken to treat the effects arising from internal rotation. All the J tensors are determined theoretically by ab initio MCSCF linear response calculations. The theoretical and experimental J coupling anisotropies, Δ1JCSi = -59.3 Hz and -89 ± 10 Hz, respectively, are in fair mutual agreement. These results indicate that the indirect contribution has to be taken into account when experimental 1DCSiexp couplings are to be applied to the determination of molecular geometry and orientation. The theoretically determined J tensors are found to be qualitatively similar to what was found in our previous calculations for ethane, which suggests that the indirect contributions can be partially corrected for by transferring the corresponding J tensors from a model molecule to another.
PROCESS FOR THE STEPWISE SYNTHESIS OF SILAHYDROCARBONS
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Page/Page column 53; 55, (2021/12/08)
The invention relates to a process for the stepwise synthesis of silahydrocarbons bearing up to four different organyl substituents at the silicon atom, wherein the process includes at least one step a) of producing a bifunctional hydridochlorosilane by a redistribution reaction, selective chlorination of hydridosilanes with an ether/HCI reagent, or by selective chlorination of hydridosilanes with SiCI4, at least one step b) of submitting a bifunctional hydridochloromonosilane to a hydrosilylation reaction, at least one step c) of hydrogenation of a chloromonosilane, and a step d) in which a silahydrocarbon compound is obtained in a hydrosilylation reaction.
Nucleophile induced ligand rearrangement reactions of alkoxy- and arylsilanes
Docherty, Jamie H.,Dominey, Andrew P.,Thomas, Stephen P.
, p. 3330 - 3335 (2019/05/10)
The ligand-redistribution reactions of aryl- and alkoxy-hydrosilanes can potentially cause the formation of gaseous hydrosilanes, which are flammable and pyrophoric. The ability of generic nucleophiles to initiate the ligand-redistribution reaction of commonly used hydrosilane reagents was investigated, alongside methods to hinder and halt the formation of hazardous hydrosilanes. Our results show that the ligand-redistribution reaction can be completely inhibited by common electrophiles and first-row transition metal pre-catalysts.
INTEGRATED PROCESS FOR THE MANUFACTURE OF METHYLCHLOROHYDRIDOMONOSILANES
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Page/Page column 41, (2019/04/16)
The present invention relates to an integrated process for the manufacture of methylchlorohydridomonosilanes in particular, from products of the Müller-Rochow Direct Process.
