METHOD OF PREPARING DI- AND TRIALKYLSILANES Russian patent published in 1998 - IPC

FIELD: chemical industry. SUBSTANCE: di- and trialkylsilanes used as Ziegler catalysts of general formula (I): R_aR¹R26

SiX_c are prepared by reacting mono-and dialkylsilanes of general formula (II): R¹R2bSiH_aX_cc with alkenes A containing at least 4 carbon atoms (optionally substituted with fluorine, bromine atoms or cyano groups) in the presence of platinum and halohydrocarbon based catalyst or ketone as activator; R is branched or cyclic hydrocarbon residue containing at least 4 carbon atoms; R¹ is alkyl residue containing at least 2 carbon atoms; X is fluorine, chlorine, bromine or alkoxy having 1-18 carbon atoms; a is 1 or 2; b is 0 or 1; c is 1 or 2. EFFECT: more efficient preparation method. 7 cl, 16 ex