SYNTHESIS AND CHARACTERIZATION OF PROTON TRANSFER SALT OF PYRIDINE-2,6-DICARBOXYLIC ACID AND ITS Ni(II) AND Cu(II) COMPLEXES

In this study the proton transfer salt (H2Meppz)(Hdipic)2 (1) was obtained by the reaction of N-methylpiperazine (Meppz) with pyridine-2,6-dicarboxylic acid (H2dipic). The metal complexes [Ni(H2O)6][Ni(dipic)2].(Meppz).5H2O (2) and (H2Meppz)[Cu(dipic)2].2H2O (3) were synthesized by the reaction of proton transfer salt (1) with Ni(CH3COO)2.4H2O and Cu(CH3COO)2.2H2O. The structure of proton transfer salt (1) was characterized by 1H and 13C NMR, FT-IR and UV-Vis spectra and elemental analysis techniques. The structures of the complexes have been suggested according to data obtained from FT-IR, UV-Vis, ICP-OES, magnetic susceptibility and elemental analysis methods