Acta Cryst. (2013). E69, o1108 [ doi:10.1107/S1600536813016176 ]
Abstract: In the title salt, C12H28N2O42+·2C5H4NO2-, the 1,4,10,13-tetraoxa-7,16-diazacyclooctadecane dication possesses inversion symmetry. In the crystal, the pyrrole-carboxylate anions are linked via pairs of N-HO hydrogen bonds, forming inversion dimers. These dimers are linked by the dications, via N-HO hydrogen bonds, forming chains propagating along .
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