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

Abstract

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.