1,1′-[(1,3-Dihydroxypropane-2,2-diyl)dimethylene]dipyridinium bis­(hexa­fluoro­phosphate)

The title compound, C(15)H(20)N(2)O(2) (2+)·2PF(6) (−), was prepared by anion exchange of two bromide ions in the ionic liquid 2,2′-bis-(pyridinium-1-ylmeth­yl)-propane-1,3-diol dibromide with potassium hexa­fluoro­phosphate. The two pyridine rings are planar (r.m.s. deviations = 0.008 and 0.00440 Å) and make a dihedral angle of 44.0 (2)°. Intermolecular O—H⋯F and C—H⋯F interactions occur. The four F atoms in each anion were refined as disordered over two sets of sites with an occupancy ration of 0.700 (19):0.300 (19).