COMPOUNDS COMPRISING GROUP IV B METAL COMPLEXED WITH A BIDENTATE LIGAND CONTAINING A CYCLOPENTADIENE MOIETY; CATALYST SYSTEMS AND OLEFIN POLYMERISATION PROCESSES

摘要

This invention relates to a compound of the general formula: CHEM wherein M is Zr, Hf or Ti; (C5H4-xRx) is a cyclopentadienyl ring which is substituted with up to five groups R, "x" is 1, 2, 3 or 4 denoting the degree of substitution, and each substituent group R is, independently, a radical selected from a group consisting of C1-C20 hydrocarbyl radicals, substituted C1-C20 hydrocarbyl radicals wherein one or more hydrogen atoms are replaced by a halogen atom, an amido radical, a phosphido radical, an alkoxy radical or any other radical containing a Lewis acidic or basic functionality; C1-C20 hydrocarbyl-substituted metalloid radicals wherein the metalloid is selected from the Group IV A of the Periodic Table of Elements; halogen radicals, amido radicals, phosphido radicals, alkoxy radicals, alkyl borido radicals or any other radical containing Lewis acidic or basic functionality or (C5H4-xRx) is a cyclopentadienyl ring in which two adjacent R-groups are joined from C4-C20 ring to give a saturated or unsaturated polycyclic cyclopentadienyl ligand; (JR'z-2) is a heteroatom ligand with a coordination number of three from Group V A of the Periodic Table of Elements, each R' is, independently a radical selected from a group consisting of C1-C20 hydrocarbyl radicals, substituted C1-C20 hydrocarbyl radicals wherein one or more hydrogen atoms is replaced by a halogen atom, an amido radical, a phosphido radical, an alkoxy radical or any other radical containing Lewis acidic or basic functionality, and "z" is the coordination number of the element J; each Q or Q' is, independently any univalent anionic ligand or Q and Q' are a divalent anionic chelating agent, M' has the same meaning as M; B is covalent bridging group containing a Group IV A or V A element; and L is a Lewis base where "w" denotes a number from 0 to 3.a