Fun, H.-K.Chia, T.S.Padaki, M.Isloor, A.M.A.F., A.F.2026-02-052012Acta Crystallographica Section E: Structure Reports Online, 2012, 68, 7, pp. o2277-o227816005368https://doi.org/10.1107/S1600536812028930https://idr.nitk.ac.in/handle/123456789/26992The asymmetric unit of the title compound, C<inf>21</inf>H <inf>18</inf>O<inf>2</inf>S, consists of two crystallographically independent molecules (A and B). The molecules exist in a trans conformation with respect to the central C=C bond. The naphthalene ring system makes dihedral angles of 51.62 (12) (molecule A) and 52.69 (12)°(molecule B) with the benzene ring. In molecule A, the prop-2-en-1-one group forms dihedral angles of 22.84 (15) and 29.02 (12)°with the adjacent naphthalene ring system and benzene ring, respectively, whereas the corresponding angles are 30.04 (12) and 23.33 (12)°in molecule B. In the crystal, molecules are linked by intermolecular C - H?O hydrogen bonds into head-to-tail chains along the a axis. The crystal packing also features C - H?? interactions. The crystal studied was a pseudo-merohedral twin with twin law (100 01?0 001?) and a refined component ratio of 0.6103 (16):0.3897 (16). © 2012 International Union of Crystallography.