title: [2-(2,5-Dichloro-benz-yl)-4-hy-droxy-1,1-dioxo-2H-1,2-benzothia-zin-3-yl](phen-yl)methanone.
abstract: In the title mol-ecule, C(22)H(15)Cl(2)NO(4)S, the heterocyclic thia-zine ring adopts a half-chair conformation, with the S and N atoms displaced by 0.343 (5) and 0.402 (5) Å, respectively, on opposite sides of the mean plane formed by the remaining ring atoms. The mol-ecular structure is consolidated by an intra-molecular O-H⋯O hydrogen bond, which generates an S(?) ring. In the crystal, the molecules are linked by C-H⋯O interactions into [010] chains.
authors.forename: Nazia
authors.initials: N
authors.lastname: Sattar
authors.forename: Hamid Latif
authors.initials: HL
authors.lastname: Siddiqui
authors.forename: Matloob
authors.initials: M
authors.lastname: Ahmad
authors.forename: Muhammad
authors.initials: M
authors.lastname: Akram
authors.forename: Masood
authors.initials: M
authors.lastname: Parvez