Palladium(II) complexes containing ‘mixed’ nitrogen–arsenic polydentate ligands

Abstract

Palladium(II) dihalides (Cl, Br, or I) react with R₂NC₂H₄AsPh₂ and [R₂NC₂H₄]₂AsPh, where R = H, Me, and Et, to form a series of four-co-ordinate, square planar complexes of stoicheiometry PdX₂L, when X = Cl, Br, and I and L represents any one of the aforementioned ligands. In addition, the S-bonded thiocyanate complexes, Pd(SCN)₂L, were prepared for all three bidentate ligands. The explanations for the isolation of only the S-bonded isomer and the inability to prepare five-co-ordinate complexes are discussed.