Date Published: April 01, 2012
Publisher: International Union of Crystallography
Author(s): Hamid Latif Siddiqui, Matloob Ahmad, Salman Gul, Chaudhary Muhammad Ashraf, Masood Parvez.
In the title molecule, C24H18ClNO6S, the heterocyclic thiazine ring adopts a half-chair conformation with the S and N atoms displaced by 0.406 (5) and 0.444 (5) Å, respectively, on opposite sides of the mean plane formed by the remaining ring atoms. The methoxybenzoyl and the chlorophenyl rings lie roughly parallel to each other, with a dihedral angle between the mean planes of these rings of 8.86 (10)°. The molecular structure is consolidated by intramolecular O—H⋯O and C—H⋯O interactions and the crystal packing is stabilized by intermolecular O—H⋯O and C—H⋯Cl hydrogen bonds.
For background information on the synthesis of related compounds, see: Siddiqui et al. (2007 ▶). For the biological activity of benzothiazine derivatives, see: Turck et al. (1995 ▶); Zia-ur-Rehman et al. (2006 ▶); Ahmad et al. (2010 ▶). For studies of benzothiazines as precursors for azodisperse dyes for polyesters, see: Rajagopal & Seshadri (1990 ▶). For a related structure, see: Siddiqui et al. (2008 ▶).