A New Imide-pyrazine Zinc(II) Binuclear Complex; In Situ Synthesis and Crystal Structure Determination

A new zinc(II) binuclear complex, [Zn2(μ-DPzCA)(2-MPzCI)Cl3] (1) (where DPzCA is N-(2-pyrazylcarbonyl)-2-pyrazinecarboxamidate anion and 2-MPzCI is methyl pyrazine-2-carboximidate), was synthesized from the reaction of ZnCl2.7H2O and 2-cyanopyrazine in methanolic solution at 65 °C. This complex was thoroughly characterized by elemental analysis (CHN-O), IR, Uv-Vis, 1H-NMR spectroscopy and its structure have been determined by the single-crystal X-ray diffraction. The spectroscopic investigations and X-ray structural analysis indicated that by methanolysis and in the presence of ZnCl2.7H2O salt the 2-cyanopyrazine ligand converts to methyl pyrazine-2-carboximidate. Furthermore, the bis(2-pyrazinecarbonyl)amidate anionic ligand have been prepared from 2-cyanopyrazine in the presence of ZnCl2.7H2O salt in methanolic solution.