Acta Cryst. (2012). E68, o18-o19 [ doi:10.1107/S1600536811051105 ]
Abstract: In the crystal structure of the title compound, C4H13N52+·2NO3-, the main intermolecular interactions are the N-HO hydrogen bonds between the cationic amino groups and the O atoms of the nitrate ions. All amino H atoms and nitrate O atoms are involved in the three-dimensional hydrogen-bond network. There are two graph-set motifs R22(8), which include the amino groups connected to the N atoms in the biguanide 3-, 4- and 5-positions, and the O atoms of a nitrate ion. They are extended along the a axis. An O atom of the second nitrate ion is involved in a graph-set motif C(4) that is a part of a helix-like N-HOH-N-HO chain oriented along the b axis. There are also two weak C-HO interactions in the crystal structure.
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