Group 4 metal diene complexes and addition polymerization...

C - Chemistry – Metallurgy – 07 – F

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C07F 17/00 (2006.01) C08F 4/64 (2006.01) C08F 10/00 (2006.01) C08F 4/659 (2006.01) C08F 4/6592 (2006.01)

Patent

CA 2192825

Novel Group 4 metal complexes containing one and only one cyclic delocalized, anionic, .pi.-bonded group wherein the metal is in the + 4 formal oxidation state and having a bridged ligand structure, also referred to as constrained geometry complexes and a conjugated diene divalent anionic ligand group; catalytic derivatives of such complexes including novel zwitetionic complexes; and the use thereof as catalysts for polymerizing olefins, diolefins and/or acetylenically unsaturated monomers.

L'invention se rapporte à de nouveaux complexes métalliques du Groupe 4 contenant un et un seul groupe à liaison pi , anionique, délocalisé, cyclique dans lequel le métal se trouve à l'état d'oxydation formel +4 et présente une structure de ligand pontée, ces complexes étant également appelés complexes à géométrie dite "de contrainte", ainsi qu'à un groupe de ligands anionique, divalent, diénique. L'invention se rapporte également à des dérivés catalytiques de ces complexes comprenant de nouveaux complexes zwitterioniques, et à leur utilisation comme catalyseurs pour polymériser des oléfines, des dioléfines et/ou des monomères acétyléniquement insaturés.

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