Acta Cryst. (2012). E68, o2608
[ doi:10.1107/S1600536812033533 ]

9-(Thiophen-2-yl)-8,9-dihydro-3H-pyrazolo[4,3-f]quinolin-7(6H)-one ethanol monosolvate

J. Peng and R. Jia

Abstract: In the title compound, C₁₄H₁₁N₃OS·C₂H₅OH, the dihedral angle between the pyridine N-C_fused-C_fused-C(thiophene) plane and the plane of the thiophene ring is 81.9 (3)°, indicating that they are close to perpendicular. The dihedral angle between this pyridine plane and the benzene ring is 1.3 (3)°. The thiophene ring is disordered over two coplanar orientations with an occupancy ratio of 0.692 (7):0.308 (7), while the ethanol solvent molecule is also disordered over two sets of site in a 0.66 (4):0.34 (4) ratio. In the crystal, chains are formed along the b axis by N-HO and O-HN interactions with adjacent chains being connected through C-HN and C-HS interactions.

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