Diethyl 3,4-dimethylthieno[2,3-b]thiophene-2,5-dicarboxylate

Abstract

In the title compound, C14H16O4S2, the thieno[2,3-b]thiophene ring systems are planar [maximum deviation = 0.008 (2) Å]. The molecular conformation is stabilized by intramolecular C—H...O hydrogen bonds, while the crystal packing is stabilized by C—H...O, C—H...π and π–π stacking [centroid–centroid distance = 3.6605 (14) Å] interactions, which lead to supramolecular layers in the ab plane.