Abstract
The Pd(dmen)Cl-2, 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 degrees 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.