Hydro-nium bis-(tri-fluoro-methane-sulfon-yl)amide-18-crown-6 (1/1).

The structure of the title compound, H(3)O(+)·C(2)F(6)NO(4)S(2) (-)·C(12)H(24)O(6) or [H(3)O(+)·C(12)H(24)O(6)][N(SO(2)CF(3))(2) (-)], which is an ionic liquid with a melting point of 341-343†K, has been determined at 113†K. The asymmetric unit consists of two crystallographically independent 18-crown-6 mol-ecules, two hydro-nium ions and two bis-(tri-fluoro-methane-sulfon-yl)amide anions; each 18-crown-6 mol-ecule complexes with a hydro-nium ion. In one 18-crown-6 mol-ecule, a part of the ring exhibits conformational disorder over two sets of sites with an occupancy ratio of 0.533†(13):0.467†(13). One hydro-nium ion is complexed with the ordered 18-crown-6 mol-ecule via O-H⋯O hydrogen bonds with H(2)OH⋯OC distances of 1.90†(6)-2.19†(7)†à , and the other hydro-nium ion with the disordered crown mol-ecule with distances of 1.85†(6)-2.36†(6)†à . The hydro-nium ions are also linked to the anions via O-H⋯F hydrogen bonds. The crystal studied was found to be a racemic twin with a component ratio of 0.55†(13):0.45†(13).