title: Highly enantioselective catalytic system for asymmetric copolymerization of carbon dioxide and cyclohexene oxide.
abstract: A new ligand can be easily prepared, and its intramolecular dinuclear zinc complexes act as a high performance catalyst for the asymmetric alternating copolymerization of cyclohexene oxide and CO2 under very mild conditions (1 atm CO2 , room temperature), affording completely alternating polycarbonates with up to 93.8 % enantiomeric excess (ee) and 98 % yield. A high Mn value of 28 600 and a relatively narrow polydispersity (Mw /Mn ratio) of 1.43 were also achieved.
authors.affiliation: College of Chemistry and Molecular Engineering, Zhengzhou University, 75, Daxue Street, Zhengzhou City, 450052 (P.R. China), Fax: (+86) 371-67767895.
authors.forename: Yuan-Zhao
authors.initials: YZ
authors.lastname: Hua
authors.forename: Liu-Jie
authors.initials: LJ
authors.lastname: Lu
authors.forename: Pei-Jin
authors.initials: PJ
authors.lastname: Huang
authors.forename: Dong-Hui
authors.initials: DH
authors.lastname: Wei
authors.forename: Ming-Sheng
authors.initials: MS
authors.lastname: Tang
authors.forename: Min-Can
authors.initials: MC
authors.lastname: Wang
authors.forename: Jun-Biao
authors.initials: JB
authors.lastname: Chang
keywords: asymmetric copolymerization; carbon dioxide; cyclohexene oxide; polycarbonates; zinc