Speciation studies of mono- and binuclear Pd(II) complexes involving mixed nitrogen–sulfur donor ligand and 4,4′-bipiperidine as a linker.

Pd(MME)Cl2complex, where MME = methionine methyl ester, was synthesized and characterized by elemental analysis and spectroscopic techniques. [Pd(MME)(H2O)2]2+interacts with some DNA constituents giving 1 : 1 and 1 : 2 complexes. The binuclear complexes having 4,4′-bipiperidine as a linker and involving [Pd(MME)(H2O)2]2+and DNA constituents were investigated. The results show formation of [(H2O)(MME)Pd(Bip)Pd(MME)(H2O)]4+. Inosine, uracil, and thymine interact with the previously mentioned complex by substitution of the two coordinated water molecules. Formation constants of all possible mono- and binuclear complexes were determined and their speciation diagrams were evaluated. Electronic spectra of [Pd(MME) (H2O)2]2+and its uracil complexes Speciation of mono- and binuclear Pd(II) complexes involving mixed nitrogen–sulfur donor ligand is investigated; 4,4′-bipiperidine is used as a linker. [ABSTRACT FROM AUTHOR]