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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 dipicted by circles of an arbitrary radius. The unlabelled atoms of the imidazolium cation are related to the labelled ones by symmetry operation: 2 − x, −y, 1 − z; for the anion, the symmetry operation for Br1 is x, − y, − + z. |