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The title compound, C 20 H 22 N 62+ ·2PF 6− , was prepared by the reaction of 5,5′-bis­(bromo­meth­yl)-2,2′-bipyridine with 1-methyl­imidazole. The main mol­ecule lies on an inversion center located at the mid-point of the C—C bond joining the two pyridine rings. The asymmetric unit therefore contains one half-mol­ecule and one hexa­fluoro­phosphate anion. The dihedral angle between the pyridine and imidazole rings is 76.93 (7)°. In the crystal, weak inter­molecular C—H⋯F hydrogen bonds contribute to the stabilization of the packing.

3,3′-Dimethyl-1,1′-[2,2′-bipyridine-5,5′-diylbis(methylene)]diimidazol-3-ium bis(hexafluorophosphate)