N-(3,4-Dichlorophenyl)maleamic acid

The asymmetric unit of the title compound, C10H7Cl2NO3, contains two unique molecules, both being stabilized by an intramolecular O—H⋯O hydrogen bond within their maleamic units. In the crystal structure, intermolecular N—H⋯O hydrogen bonds link the molecules into chains extending along [1 ] which are further assembled into sheets via short intermolecular C—Cl⋯O=C contacts [3.102 (2) and 3.044 (2) Å].

[1]  B. Thimme Gowda,et al.  N-(3,5-Dichlorophenyl)maleamic acid , 2009, Acta crystallographica. Section E, Structure reports online.

[2]  Marc Fourmigué,et al.  Halogen bonding: Recent advances , 2009 .

[3]  Louis J. Farrugia,et al.  WinGX suite for small-molecule single-crystal crystallography , 1999 .

[4]  Anthony L. Spek,et al.  Structure validation in chemical crystallography , 2009, Acta crystallographica. Section D, Biological crystallography.

[5]  Asha Rani,et al.  N‐(p‐Chloro­phenyl)­maleamic acid , 2002 .

[6]  良二 上田.  J. Appl. Cryst.の発刊に際して , 1970 .

[7]  G. Sheldrick.  A short history of SHELX. , 2008, Acta crystallographica. Section A, Foundations of crystallography.

[8]  Anthony C. Legon,et al.  Prereactive Complexes of Dihalogens XY with Lewis Bases B in the Gas Phase: A Systematic Case for the Halogen Analogue B⋅⋅⋅XY of the Hydrogen Bond B⋅⋅⋅HX , 1999 .

[9]  B. Thimme Gowda,et al.  N-(3,4-Dimethylphenyl)maleamic acid , 2009, Acta crystallographica. Section E, Structure reports online.

[10]  Louis J. Farrugia,et al.  ORTEP-3 for Windows - a version of ORTEP-III with a Graphical User Interface (GUI) , 1997 .

[11]  Seik Weng Ng,et al.  N-Phenylmaleamic acid , 2009, Acta crystallographica. Section E, Structure reports online.