NICKEL(II) AND PALLADIUM(II) PHOSPHINOENOLATE COMPLEXES DERIVED FROM [(CH3)(2)CH](2)PCH2C(O)C(CH3)(3)

Phosphinoenolate complexes of Ni and Pd, important as models of SHOP e thylene oligomerization catalysts, were prepared starting from the tit le ketophosphine a) by reaction with [Ni(COD)(2)] and b) by splitting of the 2-methyl-propenylpalladium chloride dimer followed by deprotona tion by sodium methoxide. NMR spectra of the complexes are discussed.