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

Akkurt, Mehmet and Kennedy, Alan R. and Younes, Sabry H. H. and Mohamed, Shaaban K. and Miller, Gary J. (2012) Diethyl 3,4-dimethylthieno[2,3-it b]thiophene-2,5-dicarboxylate. Acta Crystallographica Section E: Structure Reports, 68 (12). o3332-o3333.

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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-HO hydrogen bonds, while the crystal packing is stabilized by C-HO, C-H and - stacking [centroid-centroid distance = 3.6605 (14) Å] interactions, which lead to supramolecular layers in the ab plane.