N′-[(Z)-4-(Dimethyl­amino)benzyl­idene]-4-nitro­benzohydrazide mono­hydrate

In the asymmetric unit of the title compound, C(16)H(16)N(4)O(3)·H(2)O, there are two symmetry-independent hydrazide mol-ecules with almost identical geometries, and two independent water mol-ecules. The dihedral angles between the two benzene rings in the two hydrazide mol-ecules are 0.11 (5) and 0.77 (5)°. In one mol-ecule, an intra-molecular C-H⋯O hydrogen bond generates a ring of graph-set motif S(5). Inter-molecular N-H⋯O, O-H⋯O, O-H⋯N and C-H⋯O hydrogen bonds and π-π stacking inter-actions between the benzene rings [centroid-centroid distances in the range 3.5021 (6)-3.6403 (6) Å] are observed, together with O⋯O [2.7226 (11) Å], O⋯N [2.7072 (10) Å] and N⋯O [2.7072 (10)-2.8582 (12) Å] short contacts. The hydrazine mol-ecules are stacked along the b axis and adjacent mol-ecules are linked by water mol-ecules.