title: 3,3'-Dimethyl-1,1'-(propane-1,3-di-yl)diimidazol-1-ium bis(hexafluoro-phosphate).
abstract: In the title compound, C(11)H(18)N(4) (2+)·2PF(6) (-), the dihedral angle between the two planar imidozlium rings is 6.1 (2)°. Both [PF(6)](-) anions are disordered [occupancies 0.65 (2):0.35 (2) and 0.59 (5):0.41 (5)]. The crystal packing is stabilized by inter-molecular C-H⋯F hydrogen bonds which link two mol-ecules, forming centrosymmetric dimers.
authors.forename: Jin-Hua
authors.initials: JH
authors.lastname: Liang
authors.forename: Su-Lan
authors.initials: SL
authors.lastname: Dong
authors.forename: Hui
authors.initials: H
authors.lastname: Cang
authors.forename: Jin-Tang
authors.initials: JT
authors.lastname: Wang