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Bis(Pyrazolyl)Pyridine Late Transition Metal Complexes as Single-Site Catalysts for Ethylene Polymerization to Highly Linear Polyethylene

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Abstract

The synthesis, characterization of the halide complexes LMX n (M = Co (1), Fe (2); X = Cl; n = 2); (M = Ni (3), X = Br, n = 2) bearing 2,6-bis(3,5-dimethylpyrazol-1-ylmethyl)pyridine ligand (L) and ethylene polymerization behaviour of these complexes are described. Complexes 1–3 display reasonable activity for ethylene polymerization on treatment with activated methylaluminoxane (MAO), produce single-site catalysts that polymerized ethylene to highly linear polyethylene (PE). Molecular weights (M w) of the polymers produced are in the range (0.7–1.4) × 106 g mol−1 with relatively narrow molecular weight distribution (2.1–2.8).

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Acknowledgments

The authors are grateful to the Research Committee of the University of the Western Cape. We also wish to acknowledge Mr. Gareth Harding (University of Stellenbosch, South Africa) for GPC analysis of polymer samples.

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Authors and Affiliations

  1. Department of Chemistry, University of the Western Cape, Private Bag X17, Bellville, Cape Town, 7535, South Africa

    Hanna S. Abbo & Salam J. J. Titinchi

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  1. Hanna S. Abbo
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  2. Salam J. J. Titinchi
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Correspondence to Hanna S. Abbo.

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Abbo, H.S., Titinchi, S.J.J. Bis(Pyrazolyl)Pyridine Late Transition Metal Complexes as Single-Site Catalysts for Ethylene Polymerization to Highly Linear Polyethylene. Catal Lett 139, 90–96 (2010). https://doi.org/10.1007/s10562-010-0416-y

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  • DOI: https://doi.org/10.1007/s10562-010-0416-y

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