摘要:
The complexes WCl5(OR), where R=-CH-(CH2Cl)2 or substituted phenyl, and WOCl4 have been found to initiate ring-opening metathesis polymerization of dicyclopentadiene without any co-catalyst. Their activities are, however, lower than when they are associated with a reducing organometallic co-catalyst. The unicomponent catalysts afford a slightly crosslinked, partially soluble polymer with a relatively high content of cis double bonds in the main chain.