The addition of four hydrides of silicon to allyl and methallyl chlorides in the presence of chloroplatinic acid was studied. The four hydrides, trichlorosilane, methyldichlorosilane, dimethylchlorosilane, and phenyldichlorosilane each formed only one adduct, either the 3- chloropropyl-or 3-chloro-2-methylpropylsilane derivatives with allyl or methallyl chloride. No isomeric adducts such as 2-chloro-1-methylethylsilane were detectable.
