(4-Hydroxy-1,1-dioxo-2H-1,2-benzothiazin-3-yl)(3-methoxyphenyl)methanone

Abstract

In the title compoud, C16H13NO5S, the heterocyclic thiazine ring adopts a twist boat conformation with the S and N atoms displaced by 0.339 (5) and 0.322 (4) Å, respectively, on opposite sides of the mean plane formed by the remaining ring atoms. An intramolecular O—H...O interaction is present, forming a five-membered ring. The crystal structure is stabilized by intermolecular N—H...O hydrogen bonds, which result in chains along the b axis.