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Figure 1 Molecular structures of the components of (I), showing atom-labelling scheme and displacement ellipsoids at the 70% probability level: (a) the 2,6-dinitrobenzoate anion, and (b) the 4-[2-(pyridin-1-ium-4-yl)ethyl]pyridin-1-ium dication (unlabelled atoms are related by the symmetry operation −x, 2 − y, 1-z). |