Acta Cryst. (2002). E58, o1356-o1358  [ doi:10.1107/S1600536802020068 ]

cyclo-Bis(paraquat-m-terphenylene) tetrakis(hexafluorophosphate) tetrahydrate

T. Ravishankar, K. Chinnakali, K. Srinivasan, P. Rajakumar, A. Usman and H.-K. Fun

Abstract: In the title compound, C₆₀H₄₈N₄⁴⁺·4PF₆^-·4H₂O, the tetracation as a whole assumes a chair-like conformation, as seen by joining the centroids of the bridging terphenylene moieties with the four methylene C atoms. Two inversion-related hexafluorophophate anions are inserted into the cavity of the centrosymmetric tetracation, whereas the other two anions are situated away from the cavity. The size of the cavity is approximately 13.23 × 12.86  Å². The four water molecules are partly inserted into the cavity. In the crystal, the cations, anions and water molecules are held together by O-HO, O-HF, C-HF and C-HO intermolecular hydrogen bonds.

Online 15 November 2002

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