title: 1,3-Bis[(3-allyl-imidazol-3-ium-1-yl)meth-yl]benzene bis-(hexa-fluoridophosphate).
abstract: In the title compound, C(20)H(24)N(4) (2+)·2PF(6) (-), the ethene and 3-allyl-imidazolium moieties of the cation are disordered over two positions with refined site occupancies of 0.664 (19):0.336 (19) and 0.784 (7):0.216 (7), respectively, whereas four F atoms of one hexa-fluoridophosphate anion and all atoms in the other hexa-fluoridophosphate anion are disordered over two positions with refined site occupancies of 0.764 (5):0.2365) and 0.847 (9):0.153 (9), respectively. The benzene ring is inclined at angles of 78.2 (3), 81.3 (4) and 73.9 (12)° with the 1H-imidazol-3-ium ring and the major and minor components of the disordered 1H-imidazol-3-ium ring, respectively. In the crystal, the hexa-fluoridophosphate anions link the cations into two-dimensional networks parallel to (001) via inter-molecular C-H⋯F hydrogen bonds. The crystal structure is further consolidated by π-π [centroid-centroid distance = 3.672 (3) Å] and C-H⋯π inter-actions.
authors.forename: Rosenani A
authors.initials: RA
authors.lastname: Haque
authors.forename: Mohammed Z
authors.initials: MZ
authors.lastname: Ghdhayeb
authors.forename: Hassan H
authors.initials: HH
authors.lastname: Abdallah
authors.forename: Ching Kheng
authors.initials: CK
authors.lastname: Quah
authors.forename: Hoong-Kun
authors.initials: HK
authors.lastname: Fun