Halogenated complexes of lanthanides and their use in the...

Details Halogenated complexes of lanthanides and their use in the... Halogenated complexes of lanthanides and their use in the...

C - Chemistry, Metallurgy

07

F

C07F 5/06 (2006.01) C08F 4/52 (2006.01) C08F 4/54 (2006.01) C08F 36/04 (2006.01)

Patent

CA 2129485

Organometallic complexes of lanthanides with a well-defined stoichiometry which can be used in the stereospecific polymerization of unsaturated monomers, can be represented by the general formula: Me(Ar) (AlX3R)3 (1) wherein; Me represents a metal with atomic number 21, 39, or an atomic number of between 57 and 71, Ar represents benzene or a susbstituted benzene with from 1 to 3 alkyl groups containing from 1 to 10 carbon atoms, X is a halogen atom, whereas R is a linear, cyclic or branched alkyl radical containing from 1 to 12 carbon atoms. The preparation of the complexes is described together with their use in the stereospecific copolymerization of unsaturated monomers.

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