Journal
CHEMICAL COMMUNICATIONS
Volume 54, Issue 58, Pages 8024-8031Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c8cc03842b
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- Universite de Rennes 1, the Region Bretagne
- CNRS
- Academy of Finland [274505]
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Origins of stereoselectivity in ROP of racemic chiral cyclic esters promoted by achiral yttrium complexes, resulting in the formation of highly heterotactic polylactide, and highly syndiotactic or, more uniquely, highly isotactic poly(3-hydroxybutyrate)s, are discussed. A close interplay between the nature of the cyclic ester, most particularly of the exocyclic functional chain installed on the chiral center of beta-lactones, and the ortho-substituents installed on the phenolate rings of the ligand, results in various determining secondary interactions of steric and also electronic nature.
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