Acta Cryst. (2004). E60, o294-o296  [ doi:10.1107/S1600536804001606 ]

5-Benzyl-7,9-dimethoxy-3-phenyl-5H-pyrazolo[4,3-c]quinolin-1-ium chloride acetic acid solvate

V. N. Baumer, O. V. Silin, T. I. Savchenko, V. M. Nikitchenko and S. M. Kovalenko

Abstract: The asymmetric unit of the title compound, C₂₅H₂₂N₃O₂⁺·Cl^-·C₂H₄O₂, is composed of a 5-benzyl-7,9-dimethoxy-3-phenyl-5H-pyrazolo[4,3-c]quinolin-1-ium cation, a chloride anion and an acetic acid solvent molecule. The positive charge of the cation is located on the pyrazole ring, resulting in aromatization of the bonds in the pyrazolo[4,3-c]quinoline tricyclic system. The pyrazolium H atom forms a bifurcated hydrogen bond with the O atom of the 6-methoxy group [NO = 2.741  (2)  Å and N-HO = 117°] and with the carbonyl O atom of the acetic acid molecule [NO = 2.826  (2)  Å and N-HO = 134°]. Another hydrogen bond is observed between the acetic acid hydroxy group and the chloride anion [ClO = 2.972  (2)  Å and O-HCl = 172°].

Online 30 January 2004

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