Mono- and binuclear complexes involving [Pd(N,N-dimethylethylenediamine)(H2O)2]2+, 4,4′-bipiperidine and DNA constituents

The Pd(dmen)Cl2, where dmen = N,N-dimethethylenediamine, was synthesized and characterized by elemental analysis and spectroscopy. The complex-formation equilibria in the reaction of [Pd(dmen)(H2O)2]2+ with 4,4′-bipiperidine (Bip) and DNA constituents were investigated at 25°C and 0.1 mol L−1 ionic strength. The results show the formation of [(H2O)(dmen)Pd(Bip)Pd(dmen)(H2O)]4+. Inosine, uracil, and thymine interact with the previously mentioned complex by the substitution of two-coordinated water molecules. The formation constants of all possible mono- and binuclear complexes were determined and their speciation diagrams were evaluated.