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Keywords:

  • carbon dioxide;
  • cobalt;
  • copolymerization;
  • meso-epoxides;
  • polycarbonates
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Unprecedented enantioselectivity and catalytic activity was observed in the asymmetric copolymerization of CO2 with meso-epoxides (including the less reactive cyclopentene oxide) mediated by the dinuclear CoIII complex (S,S,S,S)-1 under mild conditions. The resultant copolymers possess more than 99 % carbonate linkages and a perfectly isotactic structure.