Crystal structure of 2-ethyl-3-(4-fluoro-phenyl-sulfon-yl)-5,7-dimethyl-1-benzo-furan.

In the title compound, C18H17FO3S, the dihedral angle between the plane of the benzo-furan ring [r.m.s. deviation = 0.006 (1) Å] and that of the 4-fluoro-phenyl ring [r.m.s. deviation = 0.004 (1) Å] is 82.45 (4)°. In the crystal, mol-ecules are linked via three different pairs of C-H⋯O hydrogen bonds, forming chains along [001] and enclosing two R (2) 2(10) and one R (2) 2(12) ring motifs. The chains are further linked by π-π inter-actions [inter-centroid distance = 3.566 (1) Å] between the furan rings of inversion-related mol-ecules, forming a two-dimensional network lying parallel to (100).