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The title compounds, (I) and (II), are di­spiro-indole-pyrrolidine-benzo­thio­phene derivatives, with (II) having a chlorine substituent on the oxo­indole unit. As a result, the conformation of the two mol­ecules differs in the angle of inclination of the indole moiety with respect to the benzo­thio­phene ring system, with a dihedral angle of 71.59 (5) in (I) and 82.27 (7)° in (II).

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In the title compound, the acenapthylene ring system and the hydrazinecarbo­thio­amide unit (=N—NH—C=S—NH–) are essentially coplanar, making a dihedral angle of 1.59 (9)°. The mol­ecular conformation is stabilized by two weak intra­molecular hydrogen bonds (N—H...O and N—H...N), which generate S(6) and S(5) ring motifs.

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In the title compound, C12H11N3O2S, the dihedral angle between the 4H-chromen-4-one ring system and the –CH=N—NH—CS—NH– unit is 6.22 (1)°. In the crystal, inversion dimers linked by pairs of N—H...O hydrogen bonds generate R22(14) loops. The dimers are reinforced by a pair of C—H...O inter­actions, which generate R22(10) loops.
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