Abstract

Four half-sandwich cobalt complexes bearing pendant sulfur or oxygen ligands have been reported and tested as catalysts for olefin polymerization in the presence of MAO. The molecular structure of complexes 1 has been determined by X-ray crystallographic analysis. Complexes 1 and 2 exhibited high activities of up to 10 6 g PE mol −1Co h −1 with moderate molecular weight ( M w ≈ 10 4 g mol −1) of polyethylene in the ethylene polymerization.

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