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The new imidazolium cyclophane 2,11,13,21,29,31-hexamethyl-5,16,24-triaza-8,19,27-triazoniaheptacyclo[10.10.6.11,3.15,8.110,14.116,19.124,27]tritriaconta-1,3(29),6,8(30),10,12,14(31),17,19(32),21,25,27(33)-dodecene tribromide dihydrate, C33H39N63+.3Br−.2H2O, belongs to a type of cylindrical macrobicyclic salt containing imidazolium groups. It has mirror symmetry, the symmetry surface is the plane of the three 2-C atoms of imidazoliums. Three bromine anions are associated with two water molecules by hydrogen bonds. The O—H⋯Br bond lengths are 2.53 (3) and 2.46 (3) Å.
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Yuan et al. (2000) studied this question.
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