Summary
Norbornene was homopolymerized by Re(CO)5Cl/C2H5AlCl2 and Re(CO)5Cl/C2H5AlCl2/1,7-octadiene. In both cases, the homopolymers were essentially of the ring-retention, rather than ring-opened type, even though Re(CO)5Cl/C2H5AlCl2 is known to promote olefin metathesis of acyclic olefins. Although the homopolymers are nearly completely saturated, they show minor unsaturation. Nmr spectral studies of the nature of the double bonds in the polymer supports a simultaneous insertion-olefin methathesis mechanism.
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Alonso, M.A., Bower, K.E., Johnston, J.A. et al. Homopolymerization of norbornene by rhenium olefin metathesis catalysts. Polymer Bulletin 19, 211–216 (1988). https://doi.org/10.1007/BF00255374
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DOI: https://doi.org/10.1007/BF00255374