Patent ID: 7795461

Claim:
A pure borosilazane compound of the formula (II) (R′R″N) q R x Hal 3−x−q Si—N(R 1 )—BR y Hal 2−y−z (NR′R″) z , where R′, R″, R and R 1 are each, independently of one another, a hydrocarbon radical, where R′, R″, R have from 1 to 20 carbon atoms or hydrogen and R 1 has from 1 to 3 carbon atoms, Hal is Cl, q is 0, 1, 2 or 3, x is 0 or 1, y is 0 or 1, z is 0, 1 or 2 and x+q<3 and y+z<2, with the proviso that the compound is not tris(dimethylamino)silylaminobis-(dimethylamino)-borane ((CH 3 ) 2 N) 3 —Si—NH—B(N(CH 3 ) 2 ) 2 , and when the compound is Cl 3 Si—N(CH 3 )—BCl 2 , the Cl 3 Si—N(CH 3 )—BCl 2 is at least 93% pure.