Add time:07/11/2019         Source:sciencedirect.com

The crystal structures of 1-(2-halo-6-fluorophenylmethyl)-1-methylimidazolium bromide salts and 1-(2-trifluoromethyl-6-fluorophenylmethyl)-1-methylimidazolium bromide [MeNC3H3NCH2C6H3X-2-F-6]+·Br− [X = F (1), Cl (2), Br (3), I (4), CF3 (5)] have been determined. The crystal structure of the hydrate of salt 1 contains π–π stacked imidazolium⋯difluorophenyl⋯difluorophenyl⋯imidazolium units. Those of salts 2, 4 and 5 possess bromide⋯halofluorophenyl⋯halofluorophenyl⋯bromide motifs comprising anion–π and π–π stacking interactions. That of salt 4 also contains bromide⋯iodide halogen bonding. The crystal structure of the sesquihydrate of salt 3 possesses bromine⋯halofluorophenyl⋯halofluorophenyl⋯bromine motifs.

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