Dimethyl 2-[2-(2,4,6-trichlorophenyl)hydrazin-1-ylidene]butanedioate

In the title compound, C12H11Cl3N2O4, the dihedral angle between the aromatic ring and the hydrazine (NH—N=C) grouping is 52.2 (3)°. The butanedioate groups exhibit planar conformations. An intramolecular N—H...O hydrogen bond links the N—H group of the hydrazine to one of the methoxy groups of the butanedioate moiety. In the crystal, molecules are linked by C—H...O hydrogen bonds and π–π interactions are also observed [centroid–centroid separation = 3.535 (1) Å].