Cationic complexes of palladium(II) containing phosphorus, arsenic, antimony and nitrogen donor ligands

Pd(ClO4)​2 reacts with several monodentate tertiary phosphines, arsines and stibines in MeCN to produce 3-​coordinate [PdL3]​[ClO4]​2 (L = Ph3P,​Ph2EtP,​Ph3As, Ph2MeAs, Nap2MeAs (Nap = 1-​naphthyl)​, Cy3As (Cy = cyclohexeyl)​, Ph3Sb)​, while the reaction in THF leads to 4-​coordinate [PdL4]​[ClO4]​2 (L = Ph3P, Ph3As, Ph3Sb)​. With chelating bidentate ligands, Pd(ClO4)​2 yields [Pd(L-​L)​2]​[ClO4]​2 (L-​L = Ph2PCH2PPh2, 2-​(α-​pyridyl)​benzimidazole)​.