Patent ID: 6686488
Filing Date: 2004-02-03
Classification: C07F,C08F,C08L,Y10S

Abstract:
A process for preparing a metal coordination complex of the formula: wherein(a) M is selected from the group consisting of titanium, zirconium, and hafnium; (b) Cp* is selected from the group consisting of cyclopentadienyl and Râ€³m-substituted cyclopentadienyl, bound in an &eegr;5 bonding mode to M, wherein Râ€³ is independently selected from the group consisting of alkyl of up to 20 carbon atoms and aryl of up to 20 carbon atoms and two adjacent Râ€³ groups may join to form a ring and m is 1 to 4; (c) Z is selected from the group consisting of CRâ€²2, CRâ€²2CRâ€²2, SiRâ€²2, and SiRâ€²2SiRâ€²2, wherein each Râ€² is independently selected from the group consisting of alkyl of up to 20 carbon atoms, aryl of up to 20 carbon atoms, and mixtures thereof of up to 20 carbon atoms; (d) Y is NR or PR, wherein R is selected from the group consisting of alkyl of up to 20 carbon atoms, aryl of up to 20 carbon atoms, and mixtures thereof of up to 20 carbon atoms; (e) X is, independently each occurrence, selected from the group consisting of hydride, halide, alkyl of up to 30 carbon atoms, aryl of up to 30 carbon atoms, aryloxy of up to a total of 30 carbon and oxygen atoms, alkoxy of up to a total of 30 carbon and oxygen atoms, cyanide, aide, acetylacetonate, norbornyl, and benzyl; and (f) n is 2, said process comprising the steps of contacting a metal compound of the formula MXn+2, or a coordinated adduct thereof with a dianionic salt compound corresponding to the formula:(L+x)y(Cp*-Z-Y)âˆ’2 or ((LXâ€³)+x)y(Cp*-Z-Y)âˆ’2 wherein: L is a metal of Group 1 or 2 of the Periodic Table of the Elements; Xâ€³ is floro, chloro, bromo, or iodo; x and y are either 1 or 2 and the product of x and y equals 2; M, X, Cp*, n, Z and Y are as previously defined, in a non-coordinating, non-polar solvent; and recovering the resulting product.