.pi.-complex compounds

C - Chemistry – Metallurgy – 07 – F

Patent

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Details

C07F 17/00 (2006.01) C08F 10/00 (2006.01) C08F 10/02 (2006.01) C08F 4/619 (2006.01)

Patent

CA 2315805

The invention relates to novel .pi.-complex compounds of transitional metals of the formulas (Ia) and (Ib), in which .pi. is a .pi. system, D a donor atom and A an acceptor atom, where D and A are linked to each other by way of a reversible coordinate bond in such a way that the donor group accepts a positive (partial) charge and the acceptor group a negative (partial) charge, the .pi.-system on the one hand and the acceptor and donor groups on the other hand are linked to the transitional metal, M represents a transitional metal of subgroup III, IV, V or VI of the periodic table of elements (Mendeleev), X represents an anion equivalent and n is zero, one, two, three or four, depending on the charge of M and the charge of .pi.. Said new .pi.-complex compounds are suitable for use as catalysts for the (co)-polymerisation of olefins, cyclo-olefins, alkynes, diolefins, vinyl ester and vinyl aromatics.

L'invention concerne de nouveaux composés du complexe .pi. de métaux de transition des formules (Ia) et (Ib), dans lesquelles .pi. est un système .pi., D est un atome donneur et A est un atome accepteur, où D et A sont liés l'un à l'autre par une liaison dative réversible, de telle manière que le groupe donneur accepte une charge positive (partielle) et le groupe accepteur une charge négative (partielle), le système .pi. d'une part et les groupes accepteur et donneur d'autre part sont liés au métal de transition, M représente un métal de transition du sous-groupe III, IV, V ou VI de la classification périodique des éléments (Mendeleïev), X représente un équivalent anionique et n vaut zéro, un, deux, trois ou bien quatre, en fonction de la charge de M et de la charge de .pi.. Ces nouveaux composés du complexe .pi. conviennent comme catalyseurs pour la (co)polymérisation d'oléfines, cyclooléfines, alcynes, dioléfines, vinylesters et vinylaromatiques.

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