Abstract
AbstractSingle‐electron‐transfer (SET) and two‐electron‐transfer reactions and their mechanisms were examined in the anionic polymerization of vinyl monomers and in the ring‐opening polymerization of lactones. SET resulted in the formation of radical anions or enolates at the initiation step of styrene or lactone polymerization with naphthalene sodium as a catalyst. However, alkali‐metal supramolecular complexes such as M+crown–M− (M = Na or K) were able to transfer two electrons to both these monomers to form carbanions as reactive intermediates. © 2002 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 40: 2158–2165, 2002
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