Method for preparing halosilane compounds

A method for preparing a halosilane compound comprising the step of effecting hydrosilylation reaction of a vinyl compound having the general formula (1):

• R1CH═CH2 (1)
• wherein R1 is a C1-C20 substituted or unsubstituted monovalent hydrocarbon group which may contain oxygen or silicon, or a silyl group having the general formula (2):
• —SiR2R3R4 (2)
• wherein R2 to R4 are each independently halogen, a C1-C10 unsubstituted monovalent hydrocarbon group or a C1-C10 unsubstituted alkoxy group, with a halogenodiorganosilane compound having the general formula (3):
• HSiR52X (3)
• wherein R5 is each independently a C1-C20 unsubstituted monovalent hydrocarbon group and X is halogen, in the presence of an iridium catalyst to produce a halosilane compound having the general formula (4):
• R1CH2CH2SiR52X (4)
• wherein R1, R5, and X are as defined above,
• the hydrosilylation reaction being effected in the co-presence of an internal olefin compound having the general formula (5):
• wherein R6 and R7 are each independently a C1-C10 unsubstituted monovalent hydrocarbon group, R6 and R7 may bond together to form a ring with the carbon atoms to which they are attached, R8 and R9 are each independently hydrogen or a C1-C10 unsubstituted monovalent hydrocarbon group and a halogenated allyl compound having the general formula (6):
• YCH2CH═CH2 (6)
• wherein Y is halogen, exclusive of the vinyl compound having formula (1).