Process for the selective oligomerization of ethylene to give -olefins
essentially consisting of C4 to C8, characterized in that
it is carried out in the presence of a catalytic system comprising the complex
having general formula (II): (L)M(Y)n wherein L represents the ligand
having general formula (I) M represents a transition metal; Y is selected from
groups of an anionic nature bound to the metal as anion in ionic couple or with
a covalent bond of the "" type.
