Synthesis and Chelating Properties of Secondary Alkylphosphite and Alkylphosphonate Palladium(II) Complexes

The preparation and properties of new neutral and cationic bis(dialkyIphosphonate)palladium(II) complexes of the types [R3'P)CIPd{P(O)(OR)2}2H] (R = Me, Et; R'= Et, Ph) and [L2Pd{P(O)(OR)2}2H] A (L2 = dppe; bipy; R = Me, Et; A = PF− 6 CIO− 4) are described. The properties as chelating ligands of the binuclear complex [PdCl{P(O)(OEt)2}2H]2 and the novel complexes described in the formation of hetero-metallic palladium(II)-rhodium(I) compounds have been studied. IR, 1H NMR and 31P NMR spectroscopic data for the isolated complexes are discussed.