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Diethyl 3H-naphtho[2,1-b]pyran-2,3-dicarboxyl-ate.

ABSTRACT: The sp(3)-hybridized methine C atom in the title compound, C(19)H(18)O(5), lies out of the mean plane of the remaining 13 atoms of the naphthopyran fused-ring system by 0.571?(1)?Å, and its H atom occupies a pseudo-equatorial site.

SUBMITTER: Asiri AM

PROVIDER: S-EPMC2968793 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Diethyl 2,3-dihydro-thieno[3,4-b]-1,4-dioxine-5,7-dicarboxyl-ate.

Project description: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.

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2'-Eth-oxy-1,3,3-trimethyl-spiro-[indoline-2,3'-3H-naphtho-[2,1-b][1,4]oxazine].

Project description:In the title compound, C(24)H(24)N(2)O(2), the five-membered ring of the indoline ring system adopts an envelope conformation with the spiro C atom at the flap. The dihedral angle between the benzene ring of the indoline ring system and the naphthalene ring system is 71.70 (7)°. In the crystal structure, pair of weak C-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers.

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Project description:The mol-ecule of the title compound, C(10)H(12)N(2)O(4), is located around an inversion center. The carboxyl-ate groups are twisted slightly with respect to the pyrazine ring, making a dihedral angle of 2.76?(19)°. In the crystal, mol-ecules are stacked along the c axis via weak C-H?O hydrogen bonds.

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Diethyl indolizine-1,3-dicarboxyl-ate.

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Diethyl 3,4-bis(acetoxy-meth-yl)thieno[2,3-b]thio-phene-2,5-dicarboxyl-ate.

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