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Updated: Apr 17, 2026

Controlled Photoredox Ring-Opening Polymerization of O-Carboxyanhydrides Mediated by Ni/Zn Complexes
Published on: November 21, 2017
Anion effect controlling the selectivity in the zinc-catalysed copolymerisation of CO2 and cyclohexene oxide
Sait Elmas1, Muhammad Afzal Subhani1, Walter Leitner2
1CAT Catalytic Center, RWTH Aachen University, Worringerweg 2, D-52074 Aachen, Germany. ; Tel.: +49 241 80 28594.
Abstract:
The choice of the anion has a surprisingly strong effect on the incorporation of CO2 into the polymer obtained during the zinc-catalysed copolymerisation of CO2 and cyclohexene oxide. The product span ranges from polyethercarbonates, where short polyether sequences alternate with carbonate linkages, to polycarbonates with a strictly alternating sequence of the repeating units. Herein, we report on the influence of the coordination ability of the anion on the selectivity and kinetics of the copolymerisation reaction.
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