Aqua-(2-hydrazino-1,10-phenanthroline)nitratocopper(II) nitrate.

In the title mononuclear complex, [Cu(NO(3))(C(12)H(10)N(4))(H(2)O)]NO(3), the Cu(II) ion assumes a distorted square-pyramidal geometry. There is a π-π stacking inter-action between the five-membered ring containing the Cu atom and a pyridine ring of a neighboring complex [centroid-centroid distance = 3.567 (2) Å and a perpendicular distance of 3.394 Å]. The crystal structure also contains inter-molecular N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds, linking cations and anions. In addition, there is a short inter-molecular contact [2.784 (6) Å] between an O atom of the coordinated nitrate group and its symmetry-related atom.