3-Benzyl-5-phenyl-2-p-tolylthiophene.

The crystal structure of 3-benzyl-5-phenyl-2-p-tolylthiophene, C24H20S, is described. The thiophene ring in the title compound is planar and its structural properties are very similar to those of thiophene. The thiophene ring in compound (1) is planar as are the phenyl rings. The structure of the thiophene ring in compound (1) is very similar to that of thiophene (Bak, Christensen, Hansen-Nygaard & Rastrup-Andersen, 1961; Bak, Christensen, Rastrup-Andersen & Tannenbaum, 1956; Harshbarger & Bauer, 1970). The C-S distances are 1.735 (2) and 1.731 (2) A, respectively, and the C-S-C bond angle is 92.3 (1) degree. The steric repulsion between the p-tolyl ring at C(2) and the benzyl group at the adjacent carbon, C(3), is minimized by the rotation of the p-tolyl group 56.1 degrees from the thiophene plane. The benzene ring at C(5) deviates from the plane of the thiophene ring by 36.9 degrees. In 2,5-bis(4-nitro-phenyl)-3,4-diphenylthiophene (Meester, Maldar, Hosmane & Chu, 1986) the angle between the 4-H nitrophenyl and thiophene rings is 26.6 degrees. The angle between the phenyl and thiophene rings in 2-amino-4-methyl-5-phenylthiophene-3-carboxamide is 54.9 degrees (Joseph, Selladurai, Kannan & Parthasarathi, 1991).