| Summary: | The title compound, C18H20N2OS, displays whole-molecule disorder over two adjacent sets of sites with an occupancy ratio of 0.630 (11):0.370 (11). In each disorder component, the cyclohexyl ring shows a chair conformation with the exocyclic C—C bond in an equatorial orientation. The dihedral angles between the cyclohexyl ring (all atoms) and the naphthyl ring system are 36.9 (6) for the major component and 20.7 (12)° for the minor component. Each component features an intramolecular N—H...O hydrogen bond, which closes an S(5) ring. In the crystal, inversion dimers linked by pairs of N—H...S hydrogen bonds generate R22(8) loops for both components. Aromatic π–π stacking interactions [shortest centroid–centroid separation = 3.593 (9) Å] and a C—H...π interaction are also observed.
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