Organometallic chemistry in aqueous solution: Water-soluble bis(dimethylphosphino)methane-bridged dipalladium complexes

Article abstract of DOI:10.1021/om00082a023

A new series of binuclear palladium complexes bridged by the diphosphine bis(dimethylphosphino)methane (dmpm) is reported. The complex, Pd₂Cl₂(dmpm)₂, has been prepared and found to have remarkably high solubility and stability in aqueous solutions. In aqueous solutions, the complex exists as Pd₂-(OH)₂(dmpm)₂ at pH > 4. In either aqueous or nonaqueous solvents, Pd₂X₂(dmpm)₂ (X = Cl, OH, OR) inserts one equivalent of CO into its Pd-Pd bond to give Pd₂X₂-(μ-CO)(dmpm)₂. The structure of Pd₂Cl₂(μ-CO)(dmpm)₂ has been determined by X-ray diffraction.