Crystal structure of di­methyl­formamidium bis­(tri­fluoro­methane­sulfon­yl)amide: an ionic liquid

At 100 K, the title mol­ecular salt, C(3)H(8)NO(+)·C(2)F(6)NO(4)S(2) (−), has ortho­rhom­bic (P2(1)2(1)2(1)) symmetry; the amino H atom of bis­(tri­fluoro­methane­sulfon­yl)amine (HNTf(2)) was transferred to the basic O atom of di­methyl­formamide (DMF) when the ionic liquid components were mixed. The structure displays an O—H⋯N hydrogen bond, which links the cation to the anion, which is reinforced by a non-conventional C—H⋯O inter­action, generating an R (2) (2)(7) loop. A further very weak C—H⋯O inter­action generates an [001] chain.