| الملخص: | The asymmetric unit of the title compound, C14H14N2O4S, consists of two crystallographically independent molecules. The molecules are twisted at the S—N bonds with C—S—N—C torsion angles of 44.2 (3) and −49.3 (3)°. The dihedral angles between the benzene rings in the two molecules are 71.53 (7) and 72.11 (7)°. The amide H atoms exhibit bifurcated intra- and intermolecular hydrogen bonds; the intramolecular N—H...O(N) hydrogen bonds generate S(7) motifs. In the crystal, the independent molecules are separately connected through the intermolecular N—H...O(S) hydrogen bonds, generating a C(4) motif and a helical chain along the b axis for one molecule and an R22(8) motif and an inversion dimer for the other. The crystal studied was a pseudo-merohedral twin with twin law (-100/0-10/001), the refined ratio of the twin domains being 0.7876 (12):0.2124 (12).
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