Acta Cryst. (2011). E67, o2149  [ doi:10.1107/S1600536811029436 ]

N-(2,4,6-Trichlorophenyl)maleamic acid

K. Shakuntala, S. Foro and B. T. Gowda

Abstract: In the crystal structure of the title compound, C₁₀H₆Cl₃NO₃, the conformation of the amide bond is trans. The C=O and O-H bonds of the acid group are in the relatively rare anti position to each other. This is a consequence of the intramolecular O-HO hydrogen bond donated to the amide carbonyl group stabilizing the molecular structure. In the crystal, intermolecular N-HO hydrogen bonds link the molecules into zigzag chains along the c axis.

Online 30 July 2011

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