Evidence of coordinative chain transfer polymerization of isoprene using iron iminopyridine/ZnEt2 catalytic systems. Issue 32 (3rd August 2021) - Hashmi, Obaid H.
Abstract : Herein, the first example of a reversible iron-mediated chain transfer polymerisation of isoprene with ZnEt2 as the chain transfer agent is reported. Abstract : Isoprene polymerization using iminopyridine-supported iron complexes combined with Al i Bu3 /[B(C6 F5 )4 ][CPh3 ] was carried out in the presence of ZnEt2 as the chain transfer agent (CTA). Detailed studies revealed that the M n of the resulting polyisoprenes and the rate of polymerization decrease steadily as the amount of CTA increases while preserving the catalyst selectivity. These results highlight the first example of a reversible iron-mediated chain transfer polymerization of isoprene.