Acta Cryst. (2006). E62, o1414-o1416  [ doi:10.1107/S1600536806008713 ]

Dicatharanthinium (2R,3R)-tartrate trihydrate

S.-F. Pei, C.-R. Sun, M.-L. Hu and Y.-J. Pan

Abstract: The title salt, bis(methyl 3,4-didehydroibogamin-6-ium-18-carboxylate) (2R,3R)-tartrate trihydrate, 2C₂₁H₂₅N₂O₂⁺·C₄H₄O₆^2-·3H₂O, contains two catharanthinium cations, a (2R,3R)-tartrate anion and three water solvent molecules. The cation contains an indole ring system with a planar conformation and a seven-membered nitrogen-containing ring with a distorted chair conformation. A network of O-HO and N-HO intermolecular hydrogen bonds stabilizes the crystal packing.

Online 15 March 2006

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