N′-[(E)-4-(Diethylamino)benzylidene]-4-nitrobenzohydrazide monohydrate

In the title compound, C(18)H(20)N(4)O(3)center dot H(2)O, the two aromatic rings are linked through a methylidenehydrazide fragment, which is fully extended with C-C-N-N, C-N-N=C and N-N=C-C torsion angles of 179.4 (2), 174.7 (2) and 178.3 (2)degrees, respectively. The dihedral angle between the two aromatic rings is 7.01 (8)degrees. In the crystal structure, the water of hydration is involved in extensive hydrogen bonding. Intermolecular O-H center dot center dot center dot O, N-H center dot center dot center dot O and O-H center dot center dot center dot N hydrogen bonds link the components of the structure into a two-dimensional network and additional stabilization is provided by weak intermolecular C-H center dot center dot center dot O hydrogen bonds.