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Figure 1 Thermal ellipsoid plot (Barbour, 2001) of [C18H24N4]2+ 2Br− at the 70% probability level; hydrogen atoms are drawn as spheres of arbitrary radius. The imidazolyl ring is disordered; the minor component of the disorder is not shown. The non-H atoms comprising the asymmetric unit are labelled and the unlabelled atoms are related by 1-x, −y, −z. |