No abstract

Key indicators: single-crystal X-ray study; T = 293 K; mean (C-C) = 0.007 Å; R factor = 0.076; wR factor = 0.147; data-to-parameter ratio = 15.2.The asymmetric unit of the title compound, C 20 H 24 N 2 O 6 S 2 , comprises one half-molecule, the remaining portion being generated via an inversion centre. The dihedral angle between the plane of the benzene ring and the SO 2 -NH-C(O)-C-C segment is 89.9 (1) . In the crystal, intermolecular N-HÁ Á ÁO(S) hydrogen bonds link the molecules into infinite chains in [101]. Related literatureFor related structures, see: Gowda et al. (2007, 2010a,b). ExperimentalCrystal data

In the crystal structure of the title compound, C13H9ClN2O5S, the N—H bond is trans to the C=O bond (H—N—C—O torsion angle = 158.4°). The dihedral angle between the two aromatic rings is 87.8 (1)°. In the crystal, mol­ecules are linked into chains along the b axis via N—H⋯O hydrogen bonds.

In the title hydrate, C17H17ClN2O2·H2O, the dihedral angles formed by the aromatic rings of the chloro­benzene and methyl­benzene groups with the mean planes of their attached NH—C(O)—CH2 fragments are 16.6 (2) and 22.8 (2)°, respectively. In the crystal, O—H⋯O and N—H⋯O hydrogen bonds link the components into a two-dimensional network parallel to the ab plane.

In the title compound, C18H18Cl2N2O6S2, the asymmetric unit contains half a mol­ecule with a center of symmetry at the mid-point of the central C—C bond. The dihedral angle between the benzene ring and the SO2—NH—C(O) segment in the two halves of the mol­ecule is 83.5 (2)°. In the crystal, N—H⋯O(S) inter­molecular hydrogen bonds link the mol­ecules into infinite chains running along the c axis. The O atom involved in the hydrogen bond has a longer S—O bond than the other O atom bonded to S [1.403 (4) versus 1.361 (4) Å].