Copolymers of 1,5‐cyclooctadiene (COD) and [2.2] paracyclophane‐1,9‐diene (PCPDE) were prepared by methathesis reaction using a well‐defined tungsten carbene complex as catalyst. UV/Vis and 1H NMR spectroscopy give evidence for a dissection of the opened PCPDE molecule into separate p‐phenylenevinylene units in the course of the polymerization. These units are distributed randomly in the polymer chain. This was confirmed by the metathetical preparation and spectroscopic investigation of a model substance and the comparison with spectra of compounds similar to the p‐phenylenevinylene units in the copolymer.
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Thorn‐Csányi et al. (1993) studied this question.
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