Zwitterionic alkene polymerization catalyst derived from Cp2Zr(η2-C2H4)PPh2Me and B(C6F5)3
Abstract
The phosphine stabilized ethylene complex of zirconocene, Cp2Zr, reacts with 1 equiv. of B(C6F5)3 to form the girdle-type zwitterion Cp2Zr+(PPh3Me)CH2CH2B–(C6F5)3 2, which serves as an ethene polymerization catalyst either with or without added B(C6F5)3.