Metal complex with a bridged cvclopentadienyl amidine ligand

Abstract

The present invention relates to a new metal complex of the formula (1), wherein: M is a group 4-6 metal R1 means is a substituent comprising a heteroatom of group 15, through which R1 is bonded to the imine carbon atom; R2-R5 are the same or different and each represents a hydrogen atom, an optionally substituted C1-10 alkyl group, an optionally substituted C1-10 alkoxy group, an optionally substituted C6-20 aryl group, an optionally substituted C6-20 aryloxy group, an optionally substituted C7-20 aralkyi group, an optionally substituted C7-20 aralkyloxy group, a silyl group substituted with optionally substituted C1-20 hydrocarbon group(s), a C1-20 hydrocarbon-substituted amino group or the adjacent R2-R5 may be linked to each other to form a ring; R6-R9 are the same or different and each represents a hydrogen atom, a halogen atom, an optionally substituted C1-10 alkyl group, an optionally substituted C1-10 alkoxy group, an optionally substituted C6-20 aryl group, an optionally substituted C6-20 aryloxy group, an optionally substituted C7-20 aralkyi group, an optionally substituted C7-20 aralkyloxy group, a silyl group substituted with optionally substituted C1-20 hydrocarbon group(s), a C1-20 hydrocarbon-substituted amino group or the adjacent R6-R9 may be linked to each other to form a ring; L is an optional neutral Lewis basic ligand, and j is an integer denoting the number of neutral ligands L; and X is an anionic ligand, and r is an integer denoting the number of anionic ligands X.

Description

technical field [0001] The present invention relates to metal complexes containing bridged cyclopentadienylamidine ligands, processes for their preparation, precursors, catalyst systems containing said metal complexes and processes for the manufacture of polymers wherein said metals are used complexes or catalyst systems. Background technique [0002] From WO2005090418 is known a process for the polymerization of at least one olefin having 2 to 8 carbon atoms in the presence of a polymerization catalyst component comprising an amidine ligand, an activator, and optionally a scavenger agent. WO2005090418 discloses a process for the copolymerization of polyethylene and at least one additional alpha olefin having from 3 to 8 carbon atoms. It is characterized in that the process is a catalyst system for the polymerization of olefins, the catalyst system comprising an organometallic complex of a Group 4 metal comprising an amidine ligand; and an activator. WO2005090418 also dis...

AI Technical Summary

Problems solved by technology

The combination of short methylene bridges and small methylamidino ligand substituents suggests that this compound has limited utility as a polymerization catalyst; the nature of the preparation also helps to hinder modifications such as the introduction of larger ligand substituents (which could lead to improved catalyst performance)

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