organic compounds
Open access
The asymmetric unit of the title compound, C18H22N2O3S, contains two molecules, exhibiting similar conformations [C—S—N—C torsion angles of −82.2 (2) and −70.4 (2)°, and dihedral angles between the mean planes of the aromatic rings of 56.6 (6) and 51.6 (6)° in molecules I and II, respectively]. However, the two independent molecules show distinctly different hydrogen-bonding patterns. In the crystal, molecules I form inversion dimers via pairs of N—HO hydrogen bonds, whereas for molecules II the N—HO hydrogen bond is intramolecular. The hydrogen-bonded dimers of I further propagate along the b-axis direction through π–π interactions [the distance between ring centroids is 3.8424 (8) Å].
organic compounds
Open access
In the title compound, C12H10BrClN2O2S, the sulfonamide group adopts a staggered conformation about the N—S bond [the C—S—N—H torsion angle is 97 (3)°] with the N-atom lone pair bisecting the O=S=O angle. For the C(Ar)—S bond, the ortho-substituted C atom bisects one of O=S–N angles [the C—C—S—N torsion angle is −57.7 (3)°]. The mean planes of the aromatic rings form a dihedral angle of 75.1 (1)°. In the crystal, molecules form inversion dimers through pairs of N—HNH2 hydrogen bonds. The molecules are further consolidated into layers along the bc plane by weaker N—HO interactions.