Vanadium procatalysts bearing chelating aryloxides: structure-activity trends in ethylene polymerisation.
High-valent vanadium complexes bearing a variety of chelating aryloxides including di- and linear tri-phenolates, C/N-capped tripods, phenoxyimines and calixarenes type ligands, when used in combination with dialkylaluminium halides as co-catalyst and a reactivator, are found to act as highly active catalytic systems for alpha-olefin polymerisation. Pro-catalyst structure-catalytic activity trends can be identified for the various ligand families employed.
Redshaw
Carl
C
School of Chemistry, University of East Anglia, Norwich, UK NR4 7TJ. carl.redshaw@uea.ac.uk