Abstract
Attempts at direct bromination of 1,3-di-methyl-imidazolium salts were futile. The title compounds, 2-bromo-1,3-di-methyl-imidazolium iodide chloro-form 0.33-solvate, C(5)H(8)BrN(2)(+)·I(-)·0.33CHCl(3), 2-bromo-1,3-di-methyl-imidazolium iodide di-chloro-methane hemisolvate, C(5)H(8)BrN(2)(+)·I(-)·0.5CH(2)Cl(2), and 2-bromo-1,3-di-methyl-imidazolium iodide hemi(diiodide), C(5)H(8)BrN(2)(+)·I(-)·0.5I(2), were obtained by methyl-ation of 2-bromo-1-methyl-imidazole. They crystallized as CHCl(3), CH(2)Cl(2) or I(2) solvates/adducts. The Br atom acts as a σ-hole to accept short C-Br⋯I inter-actions. C-H⋯I hydrogen bonds are observed in each structure.