3,3-Dibromo-1-ethyl-1H-2,1-benzo-thiazin-4(3H)-one 2,2-dioxide

6-Bromo-3,3-dichloro-1-methyl-1H-2,1-benzothia-zin-4(3H)-one 2,2-dioxide

The monomeric title compound, C₉H₆BrCl₂NO₃S, has an envelope-shaped thia­zine ring with the S atom 0.879 (9) Å out of the mean square plane of the envelope. The π–π distances between the centroids of the heterocyclic rings are 4.191 (5) and 4.110 (5) Å. The closest intermolecular inter­actions between the O atoms of the carbonyl and sulfonyl groups with Br and Cl atoms are 2.987 (7) and 2.992 (8) Å, respectively.

6-Bromo-1-methyl-1H-2,1-benzothia-zin-4(3H)-one 2,2-dioxide

In the crystal structure of the title compound, C(9)H(8)BrNO(3)S, the thia-zine ring is in the twisted form. In the crystal, pairs of inter-molecular C-H⋯O hydrogen bonds form inversion dimers with an R(2) (2)(8) ring motif. Weak inter-molecular C-H⋯Br and C-H⋯π inter-actions are also present.

Methyl 2-(N-methoxycarbonylmethyl-N-methylsulfamoyl)benzoate

In the title compound, C₁₂H₁₅NO₆S, the aromatic ring is oriented at dihedral angles of 64.76 (11) and 56.42 (13)° with respect to the planar methyl ester unit and the SO₂ group, respectively. The dihedral angle between the SO₂ group and the planar methoxy­carbonyl­methyl group is 50.42 (14)°. Intra­molecular C—H⋯O hydrogen bonding results in the formation of an eight-membered ring. In the crystal structure, inter­molecular C—H⋯O hydrogen bonds link the mol­ecules.

3,3-Dichloro-1-ethyl-1H-2,1-benzothia-zin-4(3H)-one 2,2-dioxide

In the title compound, C₁₀H₉Cl₂NO₃S, the S atom, which is a component atom of a heterocyclic ring, shows tetra­hedral coordination. The heterocyclic ring is not planar.

6-Bromo-1-ethyl-1H-2,1-benzothia-zin-4(3H)-one 2,2-dioxide

In the title compound, C₁₀H₁₀BrNO₃S, the S atom is four-coordinated in a distorted tetra­hedral configuration with nearly equal S=O bond distances; the S—C and S—N bond lengths are 1.755 (3) and 1.649 (3) Å, respectively. The heterocyclic thia­zine ring adopts a twist conformation. Adjacent mol­ecules are attached to each other through inter­molecular C—H⋯O hydrogen bonds, forming R₂²(8) and R₂²(14) ring motifs. The mol­ecules are stabilized by intra- and inter­molecular hydrogen bonds, forming a three-dimensional polymeric network.

Sodium 2-iodo-benzene-sulfonate monohydrate

In the title compound, Na⁺·C₆H₄IO₃S⁻·H₂O, the Na atom is hexa­coordinated by O atoms, forming a two-dimensional sheet-like structure in the bc plane, with the iodo­benzene rings protruding above and below. Na⋯O contact distances are in the range 2.419 (2)–2.7218 (18) Å and O⋯Na⋯O angles are in the range 73.70 (5)–158.64 (7)°. The crystal structure is stabilized by O—H⋯O and C—H⋯O hydrogen bonds and C—H⋯π inter­actions. The I atom is disordered over two positions with occupancies of 0.78 (2) and 0.22 (2).

Methyl 3-hydr-oxy-4-oxo-3,4-dihydro-2H-1,2-benzothia-zine-3-carboxyl-ate 1,1-dioxide monohydrate

In the mol-ecule of the title compound, C(10)H(9)NO(6)S·H(2)O, the benzothia-zine ring adopts an envelope conformation. An intra-molecular N-H⋯O hydrogen bond results in the formation of a nonplanar five-membered ring which has a twisted conformation. In the crystal structure, inter-molecular N-H⋯O, O-H⋯O and C-H⋯O hydrogen bonds link the mol-ecules to form a three-dimensional network. There is a π-π contact between the benzene rings [centroid-centroid distance = 3.972 (2) Å].