2-(N-Cyclo­hexyl­carbamo­yl)benzene­sulfonamide

The asymmetric unit of the title compound, C₁₃H₁₈N₂O₃S, contains two mol­ecules with similar conformations. In both mol­ecules, the cyclo­hexyl rings adopt chair conformations, with the attached N atom in an equatorial orientation and an intra­molecular N—H...O hydrogen bond generates an S(7) ring. In the crystal, N—H...O hydrogen bonds link the mol­ecules and a C—H...O hydrogen bond is also observed. The crystal studied was a racemic twin.

(2-Bromo­phen­yl)(4-hy­droxy-1,1-dioxo-2H-1,2-benzothia­zin-3-yl)methanone

In the title mol­ecule, C₁₅H₁₀BrNO₄S, the heterocyclic thia­zine ring adopts a half-chair conformation, with the S and N atoms displaced by 0.554 (7) and 0.198 (8) Å, respectively, on opposite sides of the mean plane formed by the remaining ring atoms. The mol­ecular structure is consolidated by intra­molecular O—H...O inter­actions and the crystal packing features N—H...O and C—H...O hydrogen bonds.

[2-(2,5-Dichloro­benz­yl)-4-hy­droxy-1,1-dioxo-2H-1,2-benzothia­zin-3-yl](phen­yl)methanone

In the title mol­ecule, C₂₂H₁₅Cl₂NO₄S, the heterocyclic thia­zine 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 mol­ecular structure is consolidated by an intra­molecular 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.

2-[2-(2-Bromo­phen­yl)-2-oxoeth­yl]-1λ⁶,2-benzothia­zole-1,1,3-trione

The asymmetric unit of the title compound, C₁₅H₁₀BrNO₄S, contains two different conformers in which the benzisothia­zole rings are essentially planar, with r.m.s. deviations of 0.012 and 0.017 Å. The mean planes of the benzene rings form dihedral angles 70.49 (13) and 72.79 (11)° with the benzisothia­zole rings. The orientation of the Br atoms in the two conformers exhibit the most pronounced difference, with opposing orientations in the two mol­ecules. The crystal structure is stabilized by π–π inter­actions between the benzene rings of the benzisothia­zole moieties of one mol­ecule and bromo­benzene rings of the other mol­ecule, with distances between the ring centroids of 3.599 (3) and 3.620 (3) Å, respectively. The crystal packing is further consolidated by pairs of weak inter­molecular C—H...O hydrogen bonds, which form inversion dimers.