Combining hard and soft donors in early-transition-metal olefin polymerization catalysts.
Bis(phosphanylphenoxide) complexes of the group 4 metals, upon activation by methylaluminoxane, are highly active for ethylene and propylene polymerization; a zirconium derivative possesses one of the highest propylene polymerization activities found to date for a nonmetallocene system.
Long
Richard J
RJ
Department of Chemistry, Imperial College London, Exhibition Road, London SW7 2AZ, U.K.
Gibson
Vernon C
VC
White
Andrew J P
AJ
Williams
David J
DJ