Addition of silanes containing silicon- attached hydrogen to unsaturated compounds in presence of platinized charcoal

Abstract

1. It was shown that in the addition reaction between silanes containing silicon-attached hydrogen and unsaturated compounds in presence of platinized charcoal the structures of the reactants greatly affect the course of reaction: the highest yield of addition products is given by silanes of the types RSiHCl2 and R2SiHCl and by unsaturated compounds having “active” double bonds. 2. It was found that the addition of CH3SiHCl2 and of C2H5SiHCl2 to F2C=CF2 is accompanied by a telomerization reaction. 3. It was shown that it is possible to prepare silanes of the type RR'SiHBr by reaction of RSiHCl2 with R'MgBr and to prepare also compounds having a four-membered ring including a silicon atom by the cyclization, with the aid of magnesium, of γ-chloro compounds containing at least one silicon-attached chlorine atom.