Patent ID: 6284905
Filing Date: 2001-09-04
Classification: C07F,C08F,Y10S

Abstract:
A Group 4 transition metal complex corresponding to the following formula: ##STR22##wherein:M is titanium, zirconium, or hafnium in the +4, +3, or +2 oxidation state;Y.sup.1 and Y.sup.2 are independently an anionic, cyclic or non-cyclic, .pi.-bonded group, NR.sup.1, PR.sup.1 ; NR.sup.1.sub.2 or PR.sup.1.sub.2 ;Z is boron or aluminum;Q is a neutral, anionic or dianionic ligand group depending on the oxidation state of M;j is 1, 2 or 3 depending on the oxidation state of M and the electronic nature of Q;T independently each occurrence is: ##STR23##R.sup.1 is independently each occurrence hydrogen, a hydrocarbyl group, a tri(hydrocarbyl)silyl group, or a tri(hydrocarbyl)silylhydrocarbyl group, said R.sup.1 groups containing up to 20 atoms not counting hydrogen;R.sup.5 is R.sup.1 or N(R.sup.1).sub.2 ; andtwo R.sup.1 groups together or one or more R.sup.1 groups together with R.sup.5 may optionally be joined to form a ring structure.