(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, C₁₆H₁₂ClN₅O₃. 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.