2-(4-Chlorobenzoylmethyl)-2H-1,4-benzothiazin-3(4H)-one

The six-membered heterocyclic ring in the title compound, C16H12ClNO2S, exists in a conformation intermediate between twist-boat and chair. A one-dimensional chain structure is formed as a result of intermolecular N—H⋯O and C—H⋯O hydrogen bonds via crystallographic inversion symmetry and translation along the a axis.