{2-[(2-Acetylhydrazin-1-ylidene)methyl-κ2N1,O]-6-methoxyphenolato-κO1}(nitrato-κO)copper(II) monohydrate

In the title complex, [Cu(C10H11N2O3)(NO3)]·H2O, prepared from the Schiff base N′-(3-methoxy-2-oxidobenzylidene)acetohydrazide, the CuII atom is coordinated by two O atoms and one N atom from the ligand and one O atom from a nitrate group in a distorted square-planar geometry. The CuII atom has a weak interaction with another O atom of the nitrate group. The two O atoms of the tridentate Schiff base ligand are in a trans arrangement. O—H...O and N—H...O hydrogen bonds involving the uncoordinated water molecule are observed