N,N-Diethyl-2-(4-methyl­benzene­sulfonamido)­benzamide

The asymmetric unit of the title compound, C(18)H(22)N(2)O(3)S, 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—H⋯O hydrogen bonds, whereas for molecules II the N—H⋯O 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].