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Ring-Opening Metathesis Polymerization of 5,6-Bis(Chloromethyl)-Norbornene by Tungsten(II) and Molybdenum(II) Complexes

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Abstract

The reaction of endo,endo-5,6-bis(chloromethyl)bicyclo[2.2.1]hept-2-ene in the presence of seven-coordinate tungsten(II) and molybdenum(II) complexes of the type [MCl(M'Cl3)(CO)3(NCMe)2] (M'=W, Mo; M=Sn, Ge) leads to ring-opening metathesis polymerization and to the formation of high-molecular-weight soluble polymers with dispersity index in the range 1.4-2.0 and number average molecular weights in the range 300 000-790 000 g mol-1. The geometric structure of these polymers was determined by means of 1H- and 13C-NMR spectroscopy. Molybdenum catalysts gave polymers with lower cis vinylene content (20-50%), whereas tungsten catalysts gave polymers with higher cis vinylene content (84-95%).

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Authors and Affiliations

  1. Faculty of Chemistry, University of Wrocław, ul. F. Joliot-Curie 14, 50-383, Wrocław, Poland

    Izabela Czeluśniak & Teresa Szymańska-Buzar

  2. Chemistry Department, University of Durham, Durham, DH1 3LE, UK

    Alan Kenwright & Ezat Khosravi

Authors
  1. Izabela Czeluśniak
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  2. Teresa Szymańska-Buzar
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  3. Alan Kenwright
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  4. Ezat Khosravi
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Czeluśniak, I., Szymańska-Buzar, T., Kenwright, A. et al. Ring-Opening Metathesis Polymerization of 5,6-Bis(Chloromethyl)-Norbornene by Tungsten(II) and Molybdenum(II) Complexes. Catalysis Letters 81, 157–161 (2002). https://doi.org/10.1023/A:1016512619727

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