Diethyl 2,3-dihydrothieno[3,4-b]-1,4-dioxine-5,7-dicarboxylate
نویسندگان
چکیده
The title compound, C(12)H(14)O(6)S, is a dicarboxylic acid diethyl ester of 3,4-ethyl-enedioxy-thio-phene, which is a component of electrically conductive poly(3,4-ethyl-enedioxy-thio-phene) (PEDOT). The ethyl-ene group is disordered over two sites with occupancy factors 0.64 and 0.36. Both the carbonyl groups are coplanar with the thio-phene ring. The mol-ecules form centrosymmetric dimers with an R(2) (2)(12) coupling by inter-molecular C-H⋯O hydrogen bonds [3.333 (5) Å] at the ethoxy-carbonyl groups. The dimer units are arranged to form a ribbon-like mol-ecular sheet.
منابع مشابه
5,7-Di-2-pyridyl-2,3-dihydrothieno[3,4-b][1,4]dioxine
The title compound, C(16)H(12)N(2)O(2)S, was prepared by a Neigishi cross-coupling reaction to investigate the coordination chemistry of thio-phene-containing ligands. In the mol-ecule, the pyridine rings are twisted from the thio-phene ring by 20.6 (1) and 4.1 (2)°. The six-membered dihydro-dioxine ring is in a half-chair conformation.
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The unique 3,4-ethyl-ene-dioxy-thio-phene (EDOT) unit of the title compound, C(24)H(22)N(2)O(8)S(3)·C(3)H(6)O, is twisted by 1.9 (3)° relative to the central thio-phene ring. The three heterocyclic units are anti-periplanar. In the crystal, inversion dimers linked by pairs of C-H⋯O hydrogen bonds connect the heterocycles. π-π interactions occur between the central thiophene and the imine bond o...
متن کامل5,7-Bis(1-benzothiophen-2-yl)-2,3-dihydrothieno[3,4-b][1,4]dioxine
In the title compound, C(22)H(14)O(2)S(3), the dioxane ring is disordered over two sites [site occupancies = 0.623 (3) and 0.377 (3)]; both components adopt half-chair conformations. The two benzothio-phene ring systems are asymmetrically twisted away from the attached thio-phene ring [dihedral angles = 20.57 (3) and 6.70 (3)°] and are oriented at an angle of 26.83 (3)°. No significant hydrogen...
متن کامل2-Chloromethyl-2,3-dihydrothieno[3,4-b][1,4]dioxine
In the mol-ecule of the title compound, C(7)H(7)ClO(2)S, the six-membered ring adopts a twisted conformation. In the crystal structure, weak inter-molecular C-H⋯O hydrogen bonds link the mol-ecules. There is also a weak C-H⋯π inter-action.
متن کاملCrystal structure of poly[[aqua(μ-2,3-dihydrothieno[3,4-b][1,4]dioxine-5,7-dicarboxylato-κ2 O 5:O 7)[μ-di(pyridin-4-yl)sulfane-κ2 N:N′]zinc] 0.26-hydrate]
The crystal structure of the title polymer, {[Zn(C8H4O6S)(C10H8N2S)(H2O)]·0.26H2O} n , is characterized by a layered arrangement parallel to the ab plane. The zinc cation is five-coordinated in a slightly distorted trigonal-bipyramidal coordination environment defined by two pyridine ligands, two carboxyl-ate groups of two thio-phene di-carboxyl-ate ligands, and by one water mol-ecule. The ethy...
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