2-(Naphthalen-1-yl)-4-(thiophen-2-ylmethylidene)-1,3-oxazol-5(4H)-one

Abstract

The asymmetric unit of the title compound, C18H11NO2S, contains two crystallographically independent molecules. In one molecule, the oxazole and thiophene rings are oriented at dihedral angles of 17.40 (9) and 18.18 (7)° with respect to the naphthalene ring system, while the oxazole and thiophene rings are oriented to each other at a dihedral angle of 0.86 (9)°. In the other molecule, the corresponding angles are 3.05 (8), 9.62 (6) and 7.02 (8)°, respectively. In each molecule, a weak intramolecular C—H...N hydrogen bond links the oxazole N atom to the naphthalene group. Weak intermolecular C—H...O hydrogen bonding is present in the crystal structure. π–π stacking between the oxazole and thiophene rings, between the thiophene and naphthalene rings, and between the oxaozole and naphthalene rings, [centroid–centroid distances = 3.811 (2), 3.889 (2), 3.697 (2) and 3.525 (2) Å] may further stabilize the crystal structure.