(Z)-1-(2-Chloro­phen­yl)-3-methyl-4-[2-(4-nitro­phen­yl)hydrazin-1-yl­idene]-1H-pyrazol-5(4H)-one

There are two independent mol­ecules, A and B, in the asymmetric unit of the title compound, C(16)H(12)ClN(5)O(3). The relative orientations of the chloro­phenyl ring with respect to the pyrazole ring in the two crystallographically independent mol­ecules are different, and their corresponding dihedral angles are −53.3 (2) and 114.09 (18)° in mol­ecules A and B, respectively. There are two strong intramolecular N—H⋯O hydrogen bonds, and two weak intramolecular C—H⋯O and C—H⋯Cl hydrogen bonds. The crystal packing is constructed by weak C—H⋯O and N—H⋯O inter­actions, and two π–π stacking inter­actions [centroid–centroid distances = 3.7894 (9) and 3.5719 (10) Å], forming a mol­ecular ladder along the a axis.