N′-(3-Bromo-5-chloro-2-hy­droxy­benzyl­idene)-2H-1,3-benzodioxole-5-carbo­hydrazide

The asymmetric unit of the title hydrazone compound, C₁₅H₁₀BrClN₂O₄, contains two independent mol­ecules. The dihedral angles between the benzene rings are 38.7 (3)° in one mol­ecule and 24.3 (3)° in the other. Both mol­ecules exist in trans conformations with respect to the C=N double bonds of the central methyl­idene units. Intra­molecular O—H...N contacts are observed in both mol­ecules, forming S(6) rings. In the crystal, mol­ecules are linked through N—H...O hydrogen bonds into chains along the a axis.