Acta Cryst. (2014). E70, o13 [ doi:10.1107/S160053681303242X ]
Abstract: 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-HO 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-HO hydrogen bonds and - interactions are also observed [centroid-centroid separation = 3.535 (1) Å].
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