Arylzinc Complexes as New Initiator Systems for the Production of Isobutene Copolymers with High Isoprene Content

Better rubber: The initiator system [Zn(C6F5)2]/tBuCl for isobutene/isoprene copolymerizations (see scheme) gave products with high molecular weights, significantly increased isoprene incorporation, and minimal cross-linking.