(2E)-3-(6-Methoxynaphthalen-2-yl)-1-[4-(methylsulfanyl)phenyl] prop-2-en-1-one

Abstract

The asymmetric unit of the title compound, C21H 18O2S, 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⋯π interactions. The crystal studied was a pseudo-merohedral twin with twin law (100 01̄0 001̄) and a refined component ratio of 0.6103 (16):0.3897 (16). © 2012 International Union of Crystallography.