New weakly coordinating counter anions for high activity polymerisation catalysts: [(C6F5)3B–CN–B(C6F5)3]– and [Ni{CNB(C6F5)3}4]2–
Abstract
The new borate [CPh3]+[CN{B(C6F5)3}2]– and the anionic isocyanoborate complex [Ni{CNB(C6F5)3}4]2– are readily accessible in one-pot reactions and act as a highly efficient activators for metallocene polymerisation catalysts; turnover numbers of up to 53 000 s–1 appear to be the highest reported so far for ethene polymerisation catalysts.