Polycarboxylates are extremely popular as ligands in designing coordination compound with various dimensionalities and network topologies. In this work, we report on a new coordination compound of CuII atom which was successfully obtained applying proton transfer methodology. The reaction of metallic salt with pyrazine-2,3-dicarboxylic acid (pzdcH2) and 2-amino-4-methyl pyridine (ampy) afforded a new crystalline compound, namely (ampyH)[Cu(pzdc)2(H2O)2] (1). The compound 1 is a mononuclear supramolecular compound which ampy acts as a counter ions and cationic fragment as we expected. The title compound was characterized by elemental analysis, IR, and single crystal X-ray diffraction. The structure of the title compound was further established by thermogravimetric analysis which verifying our compound is quite thermal stable. The carried out potentiometric and DFT calculations studies are in good agreement with solid states data.

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