Patent ID: 7265235

Claim:
A process for preparing halogen-containing silanes of the general formula (I): R a H b SiX c (I) where R is a substituted or unsubstituted C 1-10 alkyl or C 6-10 aryl radical of which one or more carbon atoms are optionally replaced by —CO—, —CO 2 —, —O—, —S—, —SO—, —SO 2 —, —NH— or —NR′—, where R′ is a substituted or unsubstituted alkyl radical having from 1 to 20 carbon atoms, X is fluorine, chlorine or bromine, a is an integer of 1, 2 or 3, b is an integer of 0, 1, 2 or 3, and c is an integer of 1, 2, or 3, with the proviso that the sum of a+b+c=4, comprising reacting silicon, under the action of microwave energy, with elements or compounds selected from the group consisting of halogens and organohalogen compounds; organohalogen compounds; organohalogen compounds and hydrogen halide; and hydrocarbons and hydrogen halides.