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Synthetic pathways to disilylmethane, H3SiCH2SiH3, and methyldisilane, CH3SiH2SiH3

✍ Scribed by Zech, Joachim ;Schmidbaur, Hubert

Publisher
Wiley (John Wiley & Sons)
Year
1990
Tongue
English
Weight
508 KB
Volume
123
Category
Article
ISSN
0009-2940

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✦ Synopsis

Abstract

Disilylmethane is available in a four‐step synthesis starting with phenylsilane. This is converted into chlorophenylsilane by HCl/AlCl~3~. The reaction of PhSiH~2~Cl and dibromomethane with magnesium in tetrahydrofuran affords bis(phenylsilyl)‐methane, which yields bis(bromosilyl)methane by treatment with anhydrous hydrogen bromide. (BrH~2~Si)~2~CH~2~ is converted into disilylmethane by reduction with LiAlH~4~ in a two‐phase system using a phase‐transfer catalyst. ‐ Methyldisilane is available by alkylation of a monohalodisilane, XSi~2~H~5~ (X  Cl, Br), with methyllithium in a high‐boiling ether or by silylation of bromomethylsilane with silylpotassium. Due to secondary silylation reactions the overall yields of methyldisilane are low in all cases.

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