organic compounds
Open access
In the title compound, C13H9ClN2O5S, the dihedral angle between the benzene rings is 74.86 (11)°. The molecule is twisted at the S atom, with a dihedral angle of 82.53 (13)° between the sulfonyl benzene ring and the S—N—C=O segment. In the crystal, molecules are linked into inversion dimers through pairs of N—HO hydrogen bonds, thereby forming R22(8) loops. Molecules are linked into C(7) [010] chains by weak C—HO hydrogen bonds, and C—Hπ interactions are also observed.
organic compounds
Open access
In the title compound, C15H15NO4S, the dihedral angle between the methyl- and methoxy-substituted benzene rings is 88.99 (12)°. An intramolecular C—HO hydrogen bond occurs. In the crystal, adjacent molecules form inversion-related dimers through strong N—HO hydrogen bonds, generating R22(8) loops. The dimers are further connected through C—HO interactions that form C(8) chains parallel to (001). Molecules are also connected through other C—HO hydrogen bonds along the b axis, forming additional C(8) chains. Two aromatic π–π stacking interactions [centroid–centroid separations = 3.6150 (1) and 3.6837 (1) Å] generate a three-dimensional architecture.