Some regularities of chlorosilanes etherification

The influence of reagents, solvent polarity, and temperature on the etherification of chlorosilanes ClCH 2 SiCl 3 , VinSiCl 3 , PrSiCl 3 , and Ph 3 SiCl with ethanol was studied. Influence of reaction temperature on the ratio of the synthesized alkoxysilane and related side-product siloxane is revealed. Use of excess alcohol is shown to increase the content of siloxane. Introduction of FeCl 3 does not affect the synthesis. Solvents are shown to influence the reaction rate: the rate constant increases with increasing ɛ parameter of the solvent. The rate constant of etherification of chlorosilanes with ethanol falls in the series: ClCH 2 SiCl 3 > VinSiCl 3 > PrSiCl 3 . An explanation of the regularities is suggested.