| abstract |
The present invention discloses a catalyst component based upon a Nib cluster made of two sheets each containing four nickel atoms and that is the reaction product of: a) a first component of the general formula (I) b) a second component based on complex, of the general formula (II) wherein in the first component, the benzene ring can be substituted in positions 3 and/or position 4 and/or position 5 and/or position 6, wherein R and R' are the same or different and can be selected from a phenyl, substituted or unsubstituted or a cycloalkyl or an alkyl having from 1 to 20 carbon atoms, wherein Q is a cation, and wherein, in the second component, R' is selected from a halogen or an acetate and wherein the two arrows mean that there are two vacant sites. It also discloses a catalyst system and a process for the oligomerisation of olefins. |