title: Crystal structure of N'-[(E)-3,5-di-chloro-2-hy-droxy-benzyl-idene]-4-nitro-benzo-hydrazide di-methyl-formamide monosolvate.
abstract: In the title compound, C14H9Cl2N3O4·C3H7NO, the hydrazone mol-ecule adopts an E conformation with respect to azomethine bond, and the dihedral angle between the two aromatic rings [8.96 (11)°] shows that the rings are almost co-planar. The planar conformation of the mol-ecule is stabilized by the intra-molecular O-H⋯N hydrogen bond involving the OH group and azomethine N atom. The azomethine and keto bond distances [1.269 (2) and 1.210 (2) Å, 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⋯O hydrogen bond. In the crystal, non-classical C-H⋯O and C-H⋯Cl hydrogen bonds link the mol-ecules into chains along [322]. A supra-molecular three-dimensional architecture is created by weak C-Cl⋯π [4.163 (3) Å, 83.26 (9)°] and π-π [centroid-centroid distance = 4.0395 (14) Å] inter-actions.
authors.affiliation: Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India.
authors.forename: Bibitha
authors.initials: B
authors.lastname: Joseph
authors.affiliation: Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India.
authors.forename: N R
authors.initials: NR
authors.lastname: Sajitha
authors.affiliation: Department of Chemistry, Faculty of Science, Eastern University, Chenkalady, Sri Lanka.
authors.forename: M
authors.initials: M
authors.lastname: Sithambaresan
authors.affiliation: Department of Chemistry, TMJM Govt. College, Manimalakkunnu, India.
authors.forename: E B
authors.initials: EB
authors.lastname: Seena
authors.affiliation: Department of Applied Chemistry, Cochin University of Science and Technology, Kochi 682 022, India.
authors.forename: M R Prathapachandra
authors.initials: MR
authors.lastname: Kurup
keywords: aroyl hydrazone; crystal structure; hydrogen bonding