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Discrete, Base‐Free, Cationic Alkaline‐Earth Complexes – Access and Catalytic Activity in the Polymerization of Lactide
Author(s) -
Sarazin Yann,
Poirier Valentin,
Roisnel Thierry,
Carpentier JeanFrançois
Publication year - 2010
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201000558
Subject(s) - cationic polymerization , lactide , polymerization , catalysis , alkaline earth metal , chemistry , ring opening polymerization , denticity , counterion , polymer chemistry , zinc , ligand (biochemistry) , base (topology) , magnesium , ternary operation , combinatorial chemistry , organic chemistry , ion , alkali metal , polymer , crystal structure , programming language , mathematical analysis , biochemistry , receptor , mathematics , computer science
Well‐defined, base free cations of zinc and the alkaline‐earth metals (Mg, Ca, Sr, Ba) supported by a multidentate phenolate ligand and stabilized by perfluorinated weakly coordinating counterions are readily available by simple procedures; the solid‐state structures of the magnesium and calcium derivatives were elucidated. Upon treatment with an excess of i PrOH, these complexes generate highly efficient binary catalytic systems for the immortal ring‐opening polymerization of L ‐lactide, yielding poly( L ‐lactide)s with controlled architectures and molecular features.