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Pure Appl. Chem., 2009, Vol. 81, No. 7, pp. 1205-1215

Published online 2009-06-29

[ONNO]-type amine bis(phenolate)-based vanadium catalysts for ethylene homo- and copolymerization

Christian Lorber*

a) CNRS, LCC (Laboratoire de Chimie de Coordination), 205 route de Narbonne, F-31077 Toulouse; b) Université de Toulouse, UPS, INPT, LCC, F-31077 Toulouse, France

Abstract: The synthesis and solution and solid-state structural characterization of a family of amine bis(phenolate) [ONNO]-vanadium complexes is reviewed. These compounds have oxidation states ranging from vanadium(II) to vanadium(V), and were evaluated as olefin polymerization catalysts. In association with EtAlCl2 cocatalyst, we studied the homopolymerization of ethylene, propene, and 1-hexene, as well as the copolymerization of ethylene with α-olefins (1-hexene, 1-octene) and cycloolefins (norbornene, cyclopentene). Some of these catalysts were shown to produce copolymers with a good activity and comonomer content.