Synthesis and Spectroscopic Characterization of bis(Acetylacetonato)(Phosphine)Palladium(II) Complexes

Abstract

Six new [Pd(acac)2^PR3] complexes have been prepared from the reactions of [Pd(acac)2] with PR₃ (R = Ph-p-F, Ph-p-Cl, Ph-p-CH₃, Ph-p-OCH₃, Ph-p-N(CH₃)₂, cyclohexyl) in diethyl ether at room temperature. Comparisons of UV, IR, ¹H NMR, ³¹P NMR and ¹³C NMR spectra with those previously reported for [Pd(acac)₂(PPh₃)] demonstrate that these acetylacetonate complexes all have the structure [Pd(O,O-acac)(γ-C-acac)(PR₃)], in which one acac⁻ ligand is bidentate, coordinated through oxygen atoms, while the other is monodentate, ligated through the γ-carbon atom.