Crystal structure of N '-[(E)-3,5-dichloro2-hydroxybenzylidene]-4-nitrobenzo-hydrazide dimethylformamide monosolvate

In the title compound, C14H9Cl2N3O4 center dot C3H7NO, the hydrazone molecule adopts an E conformation with respect to azomethine bond, and the dihedral angle between the two aromatic rings [8.96 (11)degrees] shows that the rings are almost co-planar. The planar conformation of the mol-ecule is stabilized by the intra-molecular O-H center dot center dot center dot N hydrogen bond involving the OH group and azomethine N atom. The azomethine and keto bond distances [1.269 (2) and 1.210 (2) angstrom, respectively] are very close to the formal C=N and C=O bond lengths. The di-methyl-formamide solvent mol-ecule is connected to the hydrazone NH group via an N-H center dot center dot center dot O hydrogen bond. In the crystal, non-classical C-H center dot center dot center dot O and C-H center dot center dot center dot Cl hydrogen bonds link the mol-ecules into chains along [322]. A supra-molecular three-dimensional architecture is created by weak C-Cl center dot center dot center dot p [4.163 (3) angstrom, 83.26 (9)degrees] and pp [centroidcentroid distance = 4.0395 (14) angstrom] inter-actions.