1-(Thiophen-3-yl)ethanone

The structure of the title compound, C6H6OS, exhibits a flip-type disorder of the thiophene ring [occupancy ratio = 0.848 (3):0.152 (3)], which is typical for many thiophene derivatives. The puckered thiophene ring is essentially coplanar with the plane formed by the non-H atoms of the acetyl substituent, similar to its simple analogues, i.e. 3-acetyl-2-carboxythiophene, 4-acetyl-3-carboxythiophene and 3,5-diacetyl-2-ethylamino-4-methylthiophene. In the crystal structure, molecules are connected by C-H center dot center dot center dot pi hydrogen bonds, forming a sheet parallel to the (001) plane. Moreover, an inspection of the crystal lattice reveals that there are short S center dot center dot center dot O contacts connecting the molecules of adjacent sheets. Comparison of the title crystal structure with its simple 3-methoxythiophene analogue shows a close similarity in the herringbone arrangement of molecules and in the presence of C-H center dot center dot center dot pi interactions and S center dot center dot center dot O contacts.