Patent ID: 7115761
Filing Date: 2006-10-03
Classification: C07F,Y10S

Abstract:
1. A process for preparing dihalide or monohalide metallocene compounds of formula (I), wherein (ZR 1 m ) n is a divalent group bridging Cp and A; Z being C, Si, Ge, N or P, and the R 1 groups, equal to or different from each other, being hydrogen or linear or branched, saturated or unsaturated C 1 –C 20 alkyl, C 3 –C 20 cycloalkyl, C 6 –C 20 aryl, C 7 –C 20 alkylaryl or C 7 –C 20 arylalkyl groups, optionally containing one or more heteroatoms belonging to groups 13–17 of the Periodic Table of the Elements or two R 1 can form a aliphatic or aromatic C 4 –C 7 ring that can bear substituents; Cp is a substituted or unsubstituted cyclopentadienyl group, optionally condensed to one or more substituted or unsubstituted, saturated, unsaturated or aromatic rings, containing from 4 to 6 carbon atoms, optionally containing one or more heteroatoms belonging to groups 13–17 of the Periodic Table of the Elements; A is O, S, NR M is selected from zirconium, titanium or hafnium; L, equal to or different from each other, are selected from the group consisting of chlorine, bromine, and iodine; L′ is selected from the group consisting of hydrogen, a linear or branched, saturated or unsaturated C m is 1 when Z is N or P, and m is 2 when Z is C, Si or Ge; n is 0, 1, 2, 3 or 4, being 0 when r is 0 or 2; r is 0, 1 or 2; q is 1, 2, or 3; s is 0 or 1; wherein q+s=3−r; said process comprising contacting a compound of formula (II) wherein y is equal to s+q; with an halogenating agent selected from the group consisting of T T T O is an oxygen atom bonded to T R H is hydrogen; w w w