N-(3,5-Dichlorophenyl)maleamic acid

In the title compound, C10H7Cl2NO3, the asymmetric unit contains four independent molecules, which are linked to each other by N—H⋯O hydrogen bonds. The molecular structure is stabilized by a short intramolecular O—H⋯O hydrogen bond within each maleamic acid unit. In the crystal, the molecules are linked into networks through N—H⋯O hydrogen bonds and intermolecular C—Cl⋯O=C contacts [Cl⋯O = 3.0897 (12) and 3.0797 (13) Å].

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