An investigation of the principles of the interaction of phenyltrichlorosilane with methylchlorosilanes under pressure at 250° in the presence of catalysts indicated that phenyltrichlorosilane reacts in all cases with replacement of a chlorine atom, while trimethylchlorosilane reacts with replacement of a methyl group.
The formation of dimethylphenylchlorosilane in the interaction of phenyltrichlorosilane and trimethylchlorosilane involves replacement of a chlorine atom of methylphenyldichlorosilane by a methyl group of dimethylchlorosilane.
Methyltrichlorosilahe does not react under these conditions with phenyltrichlorosilane, while the methyl group of dimethyldichlorosilane is replaced only at higher temperatures (300° and above).
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Penskii, V.N., Ponomarev, V.V., Andrianov, K.A. et al. The catalytic interaction of phenylchlorosilanes with methylchlorosilanes. Russ Chem Bull 20, 1791–1796 (1971). https://doi.org/10.1007/BF00854391
- Chlorine Atom