Metal complexes have played central roles in the initiation and propagation of many important polymerization reactions.1 Studies of the reactions of metal carbonyl cluster complexes with episulfides have shown sulfur transfer and alkene elimination to be the preferred reaction pathway (e.g., eq l).2 Although thiirane, C2H4S, is able to serve as a ligand through coordination of the sulfur atom,3 very little is known about the nature of the ring opening and eventual elimination of alkene in these reactions. The
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