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Figure 1 The structure of the title compound, showing 50% probability displacement ellipsoids for the non-hydrogen atoms. The H atoms are depicted as circles of arbitrary radius. The unlabelled atoms of the imidazolium cation are related to the labelled ones by − x, − y, −z; for the anion, the symmetry operation for Br1 is 1 − x + 1, y, − z. |