Methylene bridged metallocenes as...

C - Chemistry – Metallurgy – 07 – F

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C07F 17/00 (2006.01) C07C 2/86 (2006.01) C07C 13/465 (2006.01) C08F 10/00 (2006.01)

Patent

CA 2350542

A new class of methylene-bridged metallocenes of formula (I), wherein M is a transition metal of group 3, 4, 5, 6, lanthanide or actinide; X is a monoanionic sigma ligand; R1 can be alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radicals; R2 can be halogen, alkyl, cycloalkyl, aryl, alkylaryl or arylalkyl radical; p is 0-3; m is 0-2; and n is 0-4. Furthermore, the corresponding ligands, a new process for their preparation and catalysts systems containing said methylene-bridged metallocenes are described.

L'invention concerne une nouvelle classe de métallocènes pontés par du méthylène représentés par la formule (I), dans laquelle M représente un métal de transition du groupe 3, 4, 5, 6, un lanthanide ou un actinide; X représente un ligand sigma à un seul anion; R?1¿ peut représenter des radicaux alkyle, cycloalkyle, aryle, alkylaryle ou arylalkyle; R?2¿ peut représenter un radical alkyle, cycloalkyle, aryle, alkylaryle, arylalkyle ou halogène; p vaut 0-3; m vaut 0-2; et n vaut 0-4. L'invention concerne également les ligands correspondants, un nouveau procédé de préparation de ces ligands et des systèmes de catalyse contenant lesdits métallocènes pontés par du méthylène.

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