Acta Cryst. (2007). E63, o3353-o3354  [ doi:10.1107/S1600536807030802 ]

1,2,3,4-Tetrahydroisoquinolinium hydrogensquarate

T. Kolev, B. Shivachev, R. Petrova, I. Ivanov, S. Atanasova and S. Statkova

Abstract: The asymmetric unit of the title compound, C₉H₁₂N⁺·C₄H₄O^-, contains two independent 1,2,3,4-tetrahydroisoquinolinium cations and two independent hydrogensquarate anions. In one of the cations, the N atom is disordered over two positions with occupancies of approximately 0.8 and 0.2. The pyridinium rings adopt envelope conformations. The hydrogensquarate anions are linked to form cyclic tetramers through strong O-HO hydrogen bonds. The tetrahydroisoquinolinium and hydrogensquarate ions are linked via N-HO hydrogen bonds, forming a three-dimensional framework.

Online 5 July 2007

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