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International Union of Crystallography, Acta Crystallographica Section E: Structure Reports Online, 3(68), p. o621-o622, 2012

DOI: 10.1107/s1600536812004291

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4-Hy­droxy-2-methyl-1,1-dioxo-2H-1λ6,2- benzothia­zine-3-carb­oxy­lic acid hemihydrate

Journal article published in 2012 by Farhana Aman, Waseeq Ahmad Siddiqui, Adnan Ashraf ORCID, M. Nawaz Tahir, M. Nawaz Tahir
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

In the title compound, C10H9NO5S·0.5H2O, two geometrically different organic mol­ecules are present. The benzene rings and the carboxyl­ate groups are oriented at dihedral angles of 13.44 (4) and 21.15 (18)°. In both mol­ecules, an intra­molecular O—H⋯O hydrogen bond generates an S(6) ring. In the crystal, both moleucles form inversion dimers linked by pairs of O—H⋯O hydrogen bonds to generate R 2 2(8) loops. The dimers are consolidated into chains extending along [100] by bridging O—H⋯O hydrogen bonds from the water mol­ecule. A weak C—H⋯O hydrogen bond also occurs.