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Polymerization of Ethylene Oxide with Alkyllithium Compounds and the Phosphazene Base “ t BuP 4 ”
Author(s) -
Esswein Beate,
Möller Martin
Publication year - 1996
Publication title -
angewandte chemie international edition in english
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 0570-0833
DOI - 10.1002/anie.199606231
Subject(s) - phosphazene , chemistry , ethylene oxide , alkoxide , polymerization , cryptand , base (topology) , polymer chemistry , superbase , ethylene , anionic addition polymerization , inorganic chemistry , ion , organic chemistry , polymer , catalysis , copolymer , mathematical analysis , mathematics
Well‐defined poly(ethylene oxide)s with low polydispersities are formed in the anionic polymerization of ethylene oxide with an alkyllithium/phosphazene base initiator system. The base can be regarded as a cryptand for Li + ions. The equilibrium between complexed alkoxide ion pairs and reactive free anions is thus shifted.