Acta Cryst. (2009). E65, o281  [ doi:10.1107/S1600536808043869 ]

2-Chloro-5-(2-iodobenzenesulfonamido)benzoic acid

M. N. Arshad, M. N. Tahir, I. U. Khan, W. A. Siddiqui and M. Shafiq

Abstract: In the molecule of the title compound, C₁₃H₉ClINO₄S, the coordination around the S atom is distorted tetrahedral. The aromatic rings are oriented at a dihedral angle of 74.46 (9)°. Intramolecular C-HO hydrogen bonds result in the formation of two five- and one six-membered rings, which adopt planar, envelope and twisted conformations, respectively. In the crystal structure, intermolecular N-HO and O-HO hydrogen bonds link the molecules to form R₂²(8) ring motifs, which are further linked by C-HO hydrogen bonds. - contacts between the benzene rings [centroid-centroid distances = 3.709 (3) and 3.772 (3) Å] may further stabilize the structure. The I atom is disordered over two positions, refined with occupancies of ca 0.75 and 0.25.

Online 10 January 2009

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