Method of preparing 2-chloroethyldichlorosilanes

摘要

A method for the preparation of 2-chloroethyldichlorosilanes by the reaction of vinyldichlorosilanes with hydrogen chloride in the presence of ferric chloride or tantalum chloride is disclosed. In the presence of these anhydrous metal chlorides, this reaction can be performed in the temperature range between 30 DEG and 90 DEG C., without the formation to any appreciable extent of methyl or ethyl trichlorosilane or other cleavage products. The end products obtained can also be easily separated from the byproducts by vacuum distillation without the need to resort to additional measures. The vacuum distillation can also be performed in the presence of the metal chlorides.