Stoichiometric Complexation of Palladium(II) with 1,4-Dihydro-1,4-diarsinine as a Rigid Symmetrical Bidentate Ligand

Bimetallic and monometallic palladium(II) complexes with 1,4-dihydro-1,4-dimethyl-2,3,5,6-tetrakis(methoxycarbonyl)-1,4-diarsinine (1) were selectively obtained by stoichiometric addition of PdCl2(PhCN)2 to 1 as [Pd2Cl4(1)2] (2) (yield 83%) and [PdCl2(1)2] (3) (yield 99%), respectively. The structures of [Pd2Cl4(1)2] (2) and [PdCl2(1)2] (3) were confirmed by 1H NMR spectra, X-ray crystallography, and elemental analysis.