Patent ID: 6242626
Filing Date: 2001-06-05
Classification: C04B,C07F

Abstract:
A process for preparing a boron-containing carbosilane comprising reacting, in an inert gas atmosphere in an aprotic solvent at a temperature that is <20.degree. C.(A) at least one halogenoalkenesilane of the formula (II) ##STR15##with(B) boranes of the formula (III)H.sub.x BR.sub.3-x.sup.5 -SMe.sub.2 or H.sub.2-x BR.sub.x.sup.5 -NHMe.sub.2 (III)wherein the boron-containing carbosilane made with the process has the formula (I) ##STR16##wherein R.sup.1 is ##STR17##R.sup.2 is R.sup.1, Cl, or Br,R.sup.3 is R.sup.5,R.sup.4 is H, a C.sub.1 -C.sub.3 -alkyl or phenyl,R.sup.5 is Cl or Br,R.sup.6, R.sup.7,independently of one another, are Cl, Br, H, a C.sub.1 -C.sub.3 -alkyl or phenyl,m is 0 or 1wherein x is 2 or 1 and the ratio of halogenoalkenesilanes of the formula (II) to boranes of the formula (III) is established by x,R' is SMe.sub.2 or NMe.sub.2 H,n is 0 when R.sup.2 is R.sup.1, andn is 1 when R.sup.2 is R.sup.5.