Abstract Hydrosilylation of cyclohexene and isopropylidenecyclohexane with chloro (methyl) silanes Me 3− n SiHCl n (n= 1–3) gives rise to cyclohexyl-and chloro (2-cyclohexylpropyl) methylsilanes. Hydrosilylation of 1-methylcyclohexene with chlorodimethylsilane (n= 1) occurs anomalously and involves double-bond migration to form a mixture of seven compounds: the cis and trans isomers of 2-, 3-, 4-chlorodimethyl (methylcyclohexyl) ...