Journal article

Discovery and optimization of new chromium catalysts for ethylene oligomerization and polymerization aided by high-throughput screening

DJ Jones, VC Gibson, SM Green, PJ Maddox, AJP White, DJ Williams

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | AMER CHEMICAL SOC | Published : 2005

Abstract

High throughput screening (HTS) of a 205 member Schiff base salicylaldimine ligand library derived from salicylaldehydes bearing bulky ortho-substituents, i.e., 9-anthracenyl, 1,4,5,8-tetramethylanthracenyl or triptycenyl, reacted in-situ with (p-tolyl)CrCl2(thf)3, identified two new classes of highly active chromium based systems for the oligomerization and polymerization of ethylene, respectively. The polymerization system comprises bidentate ortho-substituted anthracenyl Schiff bases bearing small primary or secondary alkyl imine substituents. The oligomerization catalysts are based upon tridentate ortho-triptycenyl-substituted Schiff bases with pyridylmethyl or quinolyl substituents. Val..

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University of Melbourne Researchers