Norbornene and a derivative have been polymerized to high molecular weight materials by use of the hydrated trichlorides of ruthenium, osmium, and iridium in alcoholic solvents. Structural studies on these polymers indicate that a major portion of the polymer repeating unit consists of cyclopentane rings linked in cis‐1,3 configuration with a predominance of trans double bonds.
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Michelotti et al. (1965) studied this question.
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