Patent ID: 7468451
Filing Date: 2008-12-23
Classification: C07F

Abstract:
1. A process for preparing halide metallocene compounds of formula (I): wherein (ZR Z is selected from C, Si, Ge, N or P; R Cp is an unsubstituted or substituted cyclopentadienyl, optionally condensed to one or more unsubstituted, substituted, saturated, unsaturated, or aromatic rings comprising 4 to 6 carbon atoms, said Cp optionally contains one or more heteroatoms belonging to groups 13-17 of the Periodic Table of the Elements; A is selected from O, S, NR R M is selected from zirconium, titanium, and hafnium; L is equal to or different from each other, and is selected from chlorine, bromine, iodine; L′ is selected from hydrogen, or a linear or branched, saturated or unsaturated C m is 1 or 2, wherein when Z is N or P m is 1, and when Z is C, Si, or Ge m is 2; n is 0, 1, 2, 3 or 4, wherein when r is 0 or 2 n is 0; r is 0, 1 or 2; y is 1, 2, or 3; and t is 0, 1 or 2, wherein (y+t) is equal to an oxidation state of M−(1+r); said process comprising contacting a compound of formula (II): wherein Cp, Z, R p is said oxidation state M−(1+r); with at least p minus t equivalents with respect to the metal M of the compound of formula (II) of an halogenating agent of formula (III):  wherein: L is defined above; R T is a metal of groups 2-14 of the Periodic Table of the Elements; x is ≧1; and w is ≧1, wherein (x+w) is equal to an oxidation state of T.