Tridentate ligand-containing metal catalyst complexes for...

C - Chemistry – Metallurgy – 08 – F

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C08F 4/60 (2006.01) C08F 10/00 (2006.01) C08F 4/619 (2006.01)

Patent

CA 2321712

An activated tridentate-, monoanionic-ligand-based transition metal catalyst in a reduced oxidation state for olefin polymerization is disclosed. Transition metal catalyst precursors for these catalysts have fonnulae (A), (B), in which M is a transition metal from Groups 4-9 in a reduced oxidation state, X is a monoanionic, ligand, L is a neutral donor group, E is a neutral donor group from Groups 15 and 16, E' is a monoanionic donor group from Group 15, T is a bridging group, n is 1-3 as needed to balance the charge on M, p is 0-3 and q is 1-2. Olefin polymerization is exemplified.

L'invention concerne un catalyseur à base de métaux de transition avec un ligand monoanionique tridentate activé dans un état d'oxydation réduite, destiné à la polymérisation d'oléfines. Les précurseurs de catalyseurs à base de métaux de transition pour ces catalyseurs correspondent aux formules (A), (B), dans lesquelles M est un métal de transition des groupes 4-9 dans un état d'oxydation réduite; X est un ligand monoanionique; L est un groupe donneur neutre; E est un groupe donneur neutre choisi parmi les groupes 15 et 16; E' est un groupe donneur monoanionique neutre pris dans le groupe 15; T est un groupe formant des ponts; n est 1 à 3, selon les besoins, et sert à équilibrer la charge de M; p est 0 à 3; et q est 1 ou 2. On cite un exemple de polymérisation d'oléfines.

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