Patent ID: 6420299
Filing Date: 2002-07-16
Classification: C07F,Y10S

Abstract:
A metal complex corresponding to the formula: wherein M is a metal from one of Groups 3 to 13 of the Periodic Table of the Elements, the lanthanides or actinides,Z is a divalent moiety comprising boron, or a member of Group 14 of the Periodic Table of the Elements, and also comprising nitrogen, phosphorus, sulfur or oxygen; X is an anionic ligand group having up to 60 atoms not counting hydrogen, and optionally 2 X groups together form a divalent anionic ligand group; Xâ€² independently each occurrence is a neutral Lewis base ligand having up to 20 atoms; p is a number from 0 to 5, and is two less than the formal oxidation state of M; q is zero, 1 or 2; E is silicon or carbon, RA independently each occurrence is hydrogen or RB; RB is BRC2, or a hydrocarbyl, hydrocarbylsilyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, di(hydrocarbyl)amino-substituted hydrocarbyl, BRC2-substituted hydrocarbyl, hydrocarbylsilylhydrocarbyl, di(hydrocarbyl)amino, hydrocarbadiylamino, or hydrocarbyloxy group, each RB having from 1 to 80 atoms not counting hydrogen, and optionally two RB groups may be covalently linked to form one or more fused rings; and RC independently each occurrence is hydrocarbyl, halo-substituted hydrocarbyl, hydrocarbyloxy-substituted hydrocarbyl, dihydrocarbylamino-substituted hydrocarbyl, hydrocarbadiylamino-substituted hydrocarbyl, hydrocarbylsilyl, hydrocarbylsilylhydrocarbyl, or RD; RD independently each occurrence is a dihydrocarbylamino group having from 1 to 20 nonhydrogen atoms, and optionally two RD groups on a single boron together form a hydrocarbadiylamino- or hydrocarbadiyldiamino-group having both valences bound to boron; with the proviso that in at least one occurrence RA is selected from BRC2, a BRC2-substituted hydrocarbyl group, or joined derivatives thereof, wherein at least one RC is RD; RF independently each occurrence is hydrogen or a group selected from silyl, hydrocarbyl, hydrocarbyloxy and combinations thereof, said RF having up to 30 carbon or silicon atoms, and x is 1 to 8, or optionally (RF2E)x is â€”Tâ€²Zâ€²â€” or â€”(Tâ€²Zâ€²)2â€”, wherein, Tâ€² independently each occurrence is boron or aluminum, and Zâ€² independently each occurrence is: R1 is independently each occurrence hydrogen, a hydrocarbyl group, a trihydrocarbylsilyl group, or a trihydrocarbylsilylhydrocarbyl group, said R1 groups containing up to 20 atoms not counting hydrogen, and two such R1 groups may optionally be joined together to form a ring structure; and R5 is R1 or N(R1)2.