N,N,2,4,6-Penta­methyl­anilinium hexa­fluoro­phosphate–1,4,7,10,13,16-hexa­oxa­cyclo­octa­decane (2/1)

In the title compound, 2C₁₁H₁₈N⁺·2PF₆⁻·C₁₂H₂₄O₆, the 18-crown-6 mol­ecule has crystallographically imposed inversion symmetry. In the crystal, it inter­acts with the cation through weak C—H...O hydrogen bonds. The cations and anions are further linked via N—H...F and C—H...F hydrogen bonds, leading to a sandwich structure .