1-(4-Hydr-oxy-2-methyl-1,1-dioxo-2H-1,2-benzothia-zin-3-yl)ethanone

Abstract

In the title compound, C(11)H(11)NO(4)S, the thia-zine ring adopts a distorted half-chair conformation. The enolic H atom is involved in an intra-molecular O-H⋯O hydrogen bond, forming a six-membered ring. Mol-ecules are linked through weak inter-molecular C-H⋯O hydrogen bonds, resulting in chains lying along the b axis.

Fig. 1.

The molecular structure of (I), showing displacement ellipsoids at the 50% probability level for non-H atoms; dashed lines denote hydrogen bonds.

Fig. 2.

Unit cell packing of (I), showing intermolecular H-bonds resulting in the chains of molecules lying along the b axis; H atoms not involved in H-bonding have been omitted.