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].

N′-Benzyl­idene-2-chloro-N-(4-chloro­phen­yl)acetohydrazide

In the title compound, C₁₅H₁₂Cl₂N₂O, the atoms not making up the chloro­benzene ring are approximately coplanar (r.m.s. deviation = 0.073 Å). The dihedral angle between these 13 atoms and the chloro­benzene ring is 67.37 (10)°. The C=O and Csp²—Cl groups are almost eclipsed [Cl—C—C=O = −6.5 (3)°]. In the crystal, C(6) chains linked by C—H...O hydrogen bonds result in [100] chains.