title: Diethyl 3,4-dimethyl-thieno[2,3-b]thio-phene-2,5-dicarboxyl-ate.
abstract: In the title compound, C14H16O4S2, the thieno[2,3-b]thio-phene ring systems are planar [maximum deviation = 0.008 (2) Å]. The mol-ecular conformation is stabilized by intra-molecular 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] inter-actions, which lead to supra-molecular layers in the ab plane.
authors.affiliation: Department of Physics, Faculty of Sciences, Erciyes University, 38039 Kayseri, Turkey.
authors.forename: Mehmet
authors.initials: M
authors.lastname: Akkurt
authors.forename: Alan R
authors.initials: AR
authors.lastname: Kennedy
authors.forename: Sabry H H
authors.initials: SH
authors.lastname: Younes
authors.forename: Shaaban K
authors.initials: SK
authors.lastname: Mohamed
authors.forename: Gary J
authors.initials: GJ
authors.lastname: Miller