Single-electron and two-electron transfer in the anionic polymerization of vinyl monomers and the ring-opening polymerization of lactones* |
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Authors: | Zbigniew Jedliński |
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Affiliation: | Centre of Polymer Chemistry, Polish Academy of Sciences, Zabrze 41-819, Poland |
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Abstract: | Single-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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Keywords: | anionic polymerization ring-opening polymerization electron transfer styrene lactones radical anions carbanions catalysis |
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