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In the title compound, C24H24N2O3S, the phenyl rings form dihedral angles of 55.65 (11) and 79.60 (11)° with the plane of the thio­phene ring. The mol­ecular conformation is stabilized by an intra­molecular N—H...O hydrogen bond, generating an S(6) ring motif. In the crystal, centrosymmetrically related mol­ecules are linked into dimers by two pairs of C—H...O inter­actions.

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In the mol­ecule of the title compound, C13H14O4, the benzene ring forms dihedral angles of 18.60 (7) and 81.36 (8)° with the two arms of the malonate moiety. The crystal structure features C—H...O inter­actions, which form chains running parallel to the b axis.

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In the title compound, C16H17NO3S, a thio­phene derivative with amino phenyl, acetyl, methyl and ethyl carboxyl susbtituents attached to a central thio­phene ring, the phenyl and thio­phene rings form a dihedral angle of 36.92 (9) Å. The mol­ecular conformation is stabilized by an intra­molecular N—H...O hydrogen bond, which forms an S(6) ring motif.

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The asymmetric unit of the title compound, C10H6N2S2, contains two crystallographically independent but conformationally similar mol­ecules. The fused thio­phene ring cores are almost planar [maximum deviation = 0.027 (3) Å] with the thio­phene rings forming dihedral angles of 0.5 (4)° in one mol­ecule and 1.91 (4)° in the other. The crystal packing is stabilized only by van der Waals inter­actions.

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In the mol­ecule of the title di­fluoro­benzamide derivative, C10H7F2NO, the angle formed by the least-squares mean line through the prop-2-ynyl group [maximum deviation = 0.011 (3) Å] and the normal to the benzene ring is 59.03 (7)°. In the crystal, mol­ecules are linked via N—H...O and C—H...F hydrogen bonds into layers parallel to the ac plane.
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