Patent ID: 6531555
Filing Date: 2003-03-11
Classification: C07C,C08F

Abstract:
A method to oligomerize ethylene comprising combining ethylene with a catalyst system comprising an activator and one or more phenoxide metal compounds represented by the formula: whereinR3, R4, R5, R8, R9 and R10 are each independently selected from hydrogen, a halogen, a heteroatom containing group or a C1 to C100 group, provided that at least one of these groups has a Hammett &sgr;p value (Hansch, et al Chem. Rev. 1991, 91, 165) greater than 0.20; R2 and R7 are each independently selected from alkyl, aryl or silyl groups; R1 and R6 may each independently selected from an alkyl group, an aryl group, an alkoxy group, or an amino group; N is nitrogen; H is hydrogen; O is oxygen; M is a group 4 transition metal; and each X is independently an anionic ligand or a dianionic ligand.