Heteroatom-substituted vinylic compounds including vinyl ether, acetate, sulfide, and pyrrolidinone have been found to serve as efficient chain-transfer agents for ring-opening metathesis polymerization of norbornene in the presence of vinylideneruthenium complexes as the catalyst precursors, leading to selective formation of poly(norbornene)s with end-functionalities.
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Katayama et al. (1999) studied this question.
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