Problems and solutions for alkene polymerisation catalysts incorporating Schiff-bases; migratory insertion and radical mechanisms of catalyst deactivation.
Steric blocking of an intramolecular 1,2-migratory insertion reaction of a zirconium salicylaldiminato complex leads to a long-lived catalyst for ethene polymerisation, but promotes a new radical catalyst decomposition mechanism in certain instances; kinetic and thermodynamic parameters for both pathways have been established.
Knight
Paul D
PD
Department of Chemistry, University of Warwick, Coventry, UK CV4 7AL.
Clarke
Adam J
AJ
Kimberley
Brian S
BS
Jackson
Richard A
RA
Scott
Peter
P