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Problems and solutions for alkene polymerisation catalysts incorporating Schiff-bases; migratory insertion and radical mechanisms of catalyst deactivation

Author:
Knight, Paul D., Clarke, Adam J., Kimberley, Brian S., Jackson, Richard A., Scott, Peter
Source:
Chemical communications 2002 no.4 pp. 352-353
ISSN:
1364-548X
Subject:
catalysts, ethylene, polymerization, schiff bases, thermodynamics, zirconium
Abstract:
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.
Agid:
6572048