( E )-4-Methoxy- N ′-(2,3,4-trimethoxybenzylidene)benzohydrazide monohydrate

The asymmetric unit of the title compound, C 18 H 20 N 2 O 5 ·H 2 O, consists of a benzohydrazide molecule which exists in an E conformation with respect to the C=N imine bond and a water molecule. The dihedral angle between the aromatic rings is 41.67 (9)°. The methoxy substituent of the 4-methoxyphenyl group is twisted at an angle of 6.8 (3)° out of the plane of the attached benzene ring. In the 2,4,5-trimethoxyphenyl unit, the para -methoxy group is coplanar with the ring [C—C—O—C = −1.5 (3)°], whereas the ortho - and meta -methoxy groups are twisted out of the plane of the ring [C—C—O—C = 75.4 (2) and −67.1 (2)°, respectively]. Two molecules are connected by two water molecules via O—H...O hydrogen bonds, generating an R 2 2 (8) ring motif. One of the water H atoms forms an additional hydrogen bond to an N atom. The water molecules act as an acceptor for an N—H...O hydrogen bond. As a result, a three-dimensional network is formed.