The design and synthesis of coordination compounds focuse on the creation of molecular ‎motif with desired applications in which organic bulding blocks as ligands have an ‎important role in the formation of network articheture. In this regard, different synthetic ‎conditions by tuning of reaction factors such as temperature, pH, solvent and ratio of the ‎reagents can also be effective factors on the final coordination networks. ‎ In this work, two new Cu(II) complexes containing the N-(furan-2-ylmethyl)2-‎pyrazinecarboxamide flexible ligand (L) were prepared in the same condition with the ‎different ratio of the reactants (metal to ligand ratio 1:1 for compound (I) and 1:2 for ‎compound (II)). Obviously, the powder samples of title complexes have the different ‎colours. These compounds characterized by elemental analysis and IR spectroscopy. The ‎carbonyl stereching bands were observed at the different wavenumbers for two ‎complexes. In addition, the elemental analysis data indicated to the molar ratio 1:1 and 1:2 ‎of metal to ligand for compounds I and II, respectively, in accordance with the ratio of ‎reactants. ‎

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