1,1´-(1,4-Butanediyl)bis(tetrahydrofuranium) trifluoromethanesulfonate

The title compound, C₁₂H₂₄O₂²⁺·2CF₃O₃S^-, is the first bisoxonium salt for which a crystal structure is reported. The cation is located on an inversion centre and it features a nonplanar C₃O⁺ oxonium unit where the O atom is displaced by 0.375 (2) Å from the plane of its substituents.