A new tribridged imidazolium cyclo­phane

The new imidazolium cyclo­phane 2,11,13,21,29,31-hexamethyl-5,16,24-tri­aza-8,19,27-triazoniahepta­cyclo[10.10.6.1^1,3.­1^5,8.1^10,14.1^16,19.1^24,27]­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.