organic compounds
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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].