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Acta Cryst. (2013). E69, o957-o958  [ doi:10.1107/S1600536813013949 ]

L-Histidinium dipicrate dihydrate

M. Sethuram, M. V. Rajasekharan, M. Dhandapani, G. Amirthaganesan and M. NizamMohideen

Abstract: In the title molecular salt, C6H11N3O22+·2C6H2N3O7-·2H2O, the histidine molecule exists as a histidinium dication, being protonated at the N atom of the imidazole ring. The charges are balanced by two picrate anions and the compound crystallizes as a dihydrate. In the crystal, the components are linked via N-H...O and O-H...O hydrogen bonds and weak C-H...O interactions, forming a three-dimensional supermolecular structure.

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