2 O, the Co II ion is coordinated by a bidentate 2,9-dimethyl-1,10-phenanthroline (dmphen) ligand, a bidentate nitrate anion, a water molecule and a monodentate dicyanamide group in a distorted octahedral geometry. One uncoordinated dmphen molecule is situated on a crystallographic twofold axis and the asymmetric unit is completed by one water molecule. In the crystal, molecules form a onedimensional framework in the [001] direction through O-HÁ Á ÁN and O-HÁ Á ÁO hydrogen bonds. The crystal packing is further stabilized by -stacking interactions between the dmphen rings of neighboring molecules, with a centroidcentroid separation of 3.5641 (8) Å and a partially overlapped arrangement of parallel dmphen rings with a distance of 3.407 (2) Å .
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