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Acta Cryst. (2007). E63, m1855 [ doi:10.1107/S1600536807027109 ]
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2N,O)copper(II) dinitrateAbstract: 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) Å is much longer than the Cu-Oequatorial bond distance of 1.9471 (17) Å, showing a Jahn-Teller distortion. The nitrate anions are linked with the CuII complex cation via O-H
O hydrogen bonding.
Online 13 June 2007
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