Conversion of deep internal olefins into primary alkylaluminum compounds by isomerization-displacement

A process of converting at least one deep internal linear olefin having at least 6 carbon atoms in the molecule into at least one alkyl aluminum compound having at least one primary linear alkyl group derived from said olefin, said process comprising reacting said olefin with a C.sub.3-4 primary alkyl aluminum chloride in the liquid phase in the presence of a catalyst system formed from (i) a dicyclopentadienyl metal dihalide and/or a dicyclopentadienyl metal halohydride wherein the metallic constituent thereof is zirconium or hafnium and (ii) a hydridic co-catalyst component.