26799-07-5Relevant articles and documents
Tetrasilylmethan, C(SiH3)4, das Si/C-Inverse des Tetramethylsilans, Si(CH3)4
Hager, Rudolf,Steigelmann, Oliver,Mueller, Gerhard,Schmidbaur, Hubert,Robertson, Heather E.,Rankin, David W. H.
, p. 204 - 206 (2007/10/02)
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A Synthetic Route to Poly(silyl)methanes via Poly(phenylsilyl)methanes and Poly(bromosilyl)methanes
Hager, Rudolf,Steigelmann, Oliver,Mueller, Gerhard,Schmidbaur, Hubert
, p. 2115 - 2120 (2007/10/02)
A three-step synthesis is presented for di- and tri(silyl)methane, two feedstock gases for the chemical vapour deposition of amorphous hydrogenated silicon/carbon alloys (a-SiC:H).Chloro(phenyl)silane and di-or trihalomethanes react with magnesium in tetrahydrofuran to give high yields of bis- and tris(phenylsilyl)methane, respectively.The two products can be converted into bis- and tris(bromosilyl)methane by treatment with anhydrous hydrogen bromide.Bromide/hydride substitution in these precursors is accomplished with lithium aluminum hydride in a two phase system using a phase-transfer catalyst.The compounds CH2(SiH2Ph)2, CH(SiH2Ph)3, CH2(SiH2Br)2, CH(SiH2Br)3, CH2(SiH3)2, and CH(SiH3)3 have been characterized by standard spectroscopic methods, and the crystal and molecular structure of CH(SiH2Ph)3 has been determined by single-crystal X-ray diffraction.The molecule adopts a conformation with crystallographic C3 symmetry.This result is discussed with regard to the structure of related molecules with three substituents of potential Cs symmetry at a tetrahedral center. - Key Words: CVD feedstock gases / Poly(bromosilyl)methanes / Poly(phenylsilyl)methanes / Poly(silyl)methanes / Silanes
