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Acta Cryst. (2005). E61, o3294-o3296 [ doi:10.1107/S1600536805029004 ]
Abstract: The 2,2'-biimidazol-1-ium trichloroacetate ion pairs in the title compound, C6H7N4+·C2Cl3O2-, are held together by two N-H
O hydrogen bonds, and two adjacent ion pairs are linked into a centrosymmetric dimer by a pair of N-HN hydrogen bonds. The hydrogen-bonding pattern can be described in graph-set motif notation as R22(9) and R22(10). Moreover, the adjacent dimers are associated by ![[pi]](/logos/entities/pi_rmgif.gif)
- interactions between five-membered rings of the 2,2'-biimidazol-1-ium cations [at (x, y, z) and (2 - x, -y, 1 - z)], with the ring centroids separated by 3.861 (1) Å, forming a ribbon-like supramolecular array along the b axis.
Online 17 September 2005
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