High activity ethylene trimerisation catalysts based on diphosphine ligandsElectronic supplementary information (ESI) available: experimental details for catalyst screening runs, together with a typical gas uptake profile. See http://www.rsc.org/suppdata/cc/b2/b201335e/

Abstract

Chromium complexes of ligands of the type Ar₂PN(Me)PAr₂ (Ar = ortho-methoxy-substituted aryl group), on activation with MAO, are extremely active and selective catalysts for the trimerisation of ethylene.