title: Crystal structure of 2-ethyl-3-(4-fluoro-phenyl-sulfin-yl)-5,7-dimethyl-1-benzo-furan.
abstract: In the title compound, C18H17FO2S, the dihedral angle between the planes of the benzo-furan ring system (r.m.s. deviation = 0.004 Å) and the 4-fluoro-phenyl ring is 86.38 (6)°. The terminal C atom of the ethyl substituent is displaced by 1.444 (3) Å from the benzo-furan ring system to the same side of the mol-ecule as the 4-fluoro-phenyl ring. In the crystal, mol-ecules are linked via pairs of C-H⋯π inter-actions into inversion-related dimers. These dimers are further linked by π-π inter-actions between the benzene rings of neighbouring mol-ecules [centroid-centroid distance = 3.715 (3) Å] and between the furan rings of neighbouring mol-ecules [centroid-centroid distance = 3.598 (3) Å]. The mol-ecules are stacked along the a-axis direction. In the sulfinyl group, the S and O atoms are disordered over two sets of sites, with site-occupancy factors of 0.797 (3) and 0.213 (3).
authors.affiliation: Department of Chemistry, Dongeui University, San 24 Kaya-dong, Busanjin-gu, Busan 614-714, Republic of Korea.
authors.forename: Hong Dae
authors.initials: HD
authors.lastname: Choi
authors.affiliation: Department of Chemistry, Pukyong National University, 599-1 Daeyeon 3-dong, Nam-gu, Busan 608-737, Republic of Korea.
authors.forename: Uk
authors.initials: U
authors.lastname: Lee
keywords: 4-fluoro­phen­yl; benzo­furan; crystal structure; natural products; sulfinyl group; π–π inter­actions