Patent ID: 6090962
Filing Date: 2000-07-18
Classification: C07F,Y10S

Abstract:
A process for preparing a metal complex corresponding to the formula: ##STR12## wherein, M is titanium or zirconium in the +2 formal oxidation state;Z is an anionic group containing a cyclic group comprising delocalized, .pi.-electrons through which the group is bound to M, said Z group also being bound to Z' through a covalent bond, a dative bond or a divalent bridging group, said Z group having up to 60 atoms other than hydrogen;Z' is a second Z group or a moiety bound to M via a covalent or dative bond comprising boron, or a member of Group 14 of the Periodic Table of the Elements, and also comprising nitrogen, phosphorus, sulfur or oxygen, said Z' group having up to 60 atoms other than hydrogen;D is a neutral, conjugated diene, optionally substituted with one or more hydrocarbyl groups, said X having up to 40 carbon atoms;X' is a neutral Lewis base ligand selected from amines, phosphines and ethers said X' having from 3 to 20 non-hydrogen atoms; andn is a number from 0 to 3;said process comprising contacting a metal complex according to the formula: ##STR13## wherein, M* is titanium or zirconium in the +3 formal oxidation state;M** is titanium or zirconium in the +4 formal oxidation state;X* is halide or C.sub.1-20 hydrocarblyloxide; andZ, Z', X' and n are as previously defined;with a free diene corresponding to D, and subsequently or simultaneously contacting the resulting reaction mixture with a di(C.sub.1-20 alkyl) magnesium compound to form the desired metal complex.