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Ring‐opening Polymerization of L ‐Lactide by an Anionic Cobalt(II) Aryloxide
Author(s) -
Yuan Chunxiang,
Xu Xiaoping,
Zhang Yong,
Ji Shunjun
Publication year - 2012
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.201100612
Subject(s) - chemistry , cobalt , anhydrous , polymerization , polymer chemistry , molar ratio , lactide , ring (chemistry) , ring opening polymerization , medicinal chemistry , catalysis , inorganic chemistry , organic chemistry , polymer
The reaction of anhydrous CoCl 2 with NaOAr (ArO=2,4,6‐tri‐ tert ‐butylphenoxo) in THF at room temperature in 1:3 molar ratio afforded anionic cobalt aryloxide [Na(THF) 6 ][Co(OAr) 3 ] ( 1 ). The definite structure of this complex was characterized by X‐ray single crystal diffraction. It was found that this anionic aryloxo cobalt(II) complex could effectively initiate the ring‐opening polymerization of L ‐lactide both in solution and in bulk, leading to high molecular weight poly( L ‐lactide).
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