Komplexkatalyse. XXIX. Kationische allylbis(ligand)nickel(II)-hexafluorophosphate [C3H5NiL2]PF6 und die kombination [C3H5Ni(Br)P(OThym)3l/Et2AlCl als katalysatoren für die propendimerisation

Abstract

The cationic allylbis(ligand)nickel(II) complexes [C3H5NiL2]PF6 with L = P(OPh)3, P(OThym)3 and SbPh3 were found to be efficient catalysts for the oligomerization of propene under a 10 bar pressure of the monomer. The main products are dimers, and specifically the methylpentenes. The [C3H5Ni(Br)P-(OThym3]/Et2AlCl system catayzes propene dimerization at atmospheric pressure with high activity, and selectivity similar to that of the cationic allylbis(ligand)-nickel(II) complexes. In a kinetic analysis the rate law and the activation parameters Δ H≠ and Δ S≠ were determined for the propene dimerization with this catalytic system. © 1988.