Acta Cryst. (2003). E59, o183-o185  [ doi:10.1107/S1600536803000850 ]

Bis(cinchonidinium) L-tartrate dihydrate

H. Zhang, Z.-Y. Lin, Z.-H. Zhou and S. W. Ng

Abstract: Bis-(3R,4S,8S,9R)-cinchonidinium (2R,3R)-tartrate dihydrate, 2C₁₉H₂₃N₂O₂⁺·C₄H₄O₆^2-·2H₂O, is a hydrated salt of cinchonidine, in which the two protonated quinuclidinic nitrogen groups interact with the ionized carboxylate group of the tartrate; the latter has twofold symmetry. The water molecule interacts with the hydroxyl group of the cation and the O atoms of the carboxylate residues to afford a three-dimensional network structure.

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