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Plot of catalytic conversion vs. time (min) for the polymerization of (A) L-lactide with 8·Zr(OtBu)2, and (B) ε-caprolactone with [8·Zr(OtBu)2]BARF, where AcFcBARF (AcFc = Fc(COCH3)) and Co(η5-Cp)2 were used as the oxidant and reductant, respectively. Adapted with permission from Ref [61]. Copyright 2014 American Chemical Society.
