| abstract |
The invention relates to a catalytic composition comprising: at least one oxidation grade nickel precursor (+ II), at least one phosphine ligand of formula PR1R2R3 in which the groups R1, R2 and R3, identical or different from each other , whether or not linked to each other and at least one Lewis base, said composition having a molar ratio of the phosphine ligand on the nickel precursor less than or equal to 5 and a molar ratio of the Lewis base assembly and phosphine ligand on the precursor of nickel greater than or equal to 5. |