Methyl 7-chloro-2-ethylsulfanyl-6-fluoro-4-oxo-4H-thiochromene-3-carboxylate

In the title compound, C(13)H(10)ClFO(3)S(2), the two-ring system is essentially planar, the mean plane of the benzene ring being inclined at 6.0 (2)° to the plane of the remaining four atoms. The ethyl-sulfanyl group is almost coplanar with the two rings [dihedral angle = 6.4 (2)°], while the carboxyl-ate group is almost perpendicular to it [dihedral angle = 72.4 (2)°]. In the crystal structure, inter-molecular C-H⋯O and C-H⋯F hydrogen bonds link the mol-ecules in a stacked arrangement along the a axis.