Vimala. GHaribabu. JAishwarya. SKarvembu. RSubbiahPandi. A2026-08-162026-08-162015-06-2720569890https://doi.org/10.1107/S2056989015011950http://nitt.ndl.gov.in/handle/123456789/189The 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.enArticle