Patent ID: 8134038

Claim:
A process for producing an oligomeric product by the oligomerisation of at least one olefinic compound in the form of an olefin or a compound having a carbon to carbon double bond, comprising contacting the at least one olefinic compound with the combination of an oligomerisation catalyst and a catalyst activator, which catalyst activator is a salt containing an anion which includes a moiety of the formula and wherein M is selected from the group consisting of a group 3A atom; n is 1 or a larger integer; and R is a halogenated organic group, R being the same or different when n is larger than 1; and wherein the oligomerisation catalyst comprises the combination of i) a source of a transition metal; and ii) a ligating compound of the formula (R 1 ) m X 1 (Y)X 2 (R 2 ) n wherein X 1 and X 2 are independently selected from the group consisting of N, P, As, Sb, Bi, 0, S, and Se; Y is a linking group between X 1 and X 2 ; m and n are independently 0, 1 or a larger integer; and R 1 and R 2 are independently hydrogen, a hydrocarbyl group or a heterohydrocarbyl group, and R 1 being the same or different when m>1, and R 2 being the same or different when n>1.