organic compounds
Open access
In the title compound, C15H15NO4S, the dihedral angle between the benzene rings is 78.62 (16)°. In the crystal, adjacent molecules are linked along the c axis into C(4) chains through strong N—HO hydrogen bonds. Molecules are further connected through C—HO hydrogen bonds into a hexameric unit generating an R66(66) motif. Another C—HO interaction connects the molecules along the c axis, forming C(5) chains. A region of disordered electron density, most probably disordered methanol–water solvent molecules, was treated with the SQUEEZE routine in PLATON [Spek (2009). Acta Cryst. D65, 148–155]. The formula mass and unit-cell characteristics do not take into account this disordered solvent.
organic compounds
Open access
The title compound, C14H12ClNO4S, crystallizes with two molecules in the asymmetric unit. The dihedral angles between the benzene rings are 89.68 (1) (molecule 1) and 82.9 (1)° (molecule 2). In each molecule, intramolecular N—HO hydrogen bonds between the amide H atom and the methoxy O atom generate S(6) loops. In the crystal, molecule 2 is linked into inversion dimers through pairs of C—HO interactions, forming an R22(8) ring motif. Molecules 1 and 2 are further linked along the b-axis direction through C—Hπ interactions. The crystal structure is further stabilized by several π–π stacking interactions [centroid–centroid separations = 3.7793 (1), 3.6697 (1) and 3.6958 (1) Å], thus generating a three-dimensional architecture.