Abstract
The title compound, [Cu(C7H8N2O)2(H2O)2](NO3)2, was prepared by the reaction of 2-cyano-3-methylpyridine with Cu(NO3)2·3H2O in a methanol/water solution. In the crystal structure, the CuII ion is located on an inversion centre and is coordinated by two 3-methylpyridine-2-carboxamide ligands in the equatorial plane and two water molecules in the axial positions, forming an elongated octahedral coordination geometry. The Cu—Oaxial bond distance of 2.4715 (18) A is much longer than the Cu—Oequatorial bond distance of 1.9471 (17) A, showing a Jahn–Teller distortion. The nitrate anions are linked with the CuII complex cation via O—H⋯O hydrogen bonding.
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