Acta Cryst. (2003). E59, o183-o185 [ doi:10.1107/S1600536803000850 ]
Abstract: Bis-(3R,4S,8S,9R)-cinchonidinium (2R,3R)-tartrate dihydrate, 2C19H23N2O2+·C4H4O62-·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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