Acta Cryst. (2008). E64, o434 [ doi:10.1107/S1600536807067086 ]
Abstract: In the title compound, C20H19N2+·PF6-, the two benzocyclobutene units are essentially planar and they form dihedral angles of 38.0 (2) and 72.7 (2)°, with the central imidazolium ring. In the crystal structure, weak C-H and -- stacking interactions [centroid-centroid distance = 3.742 (2) Å] contribute to the stability of the crystal structure. The PF6- ion is disordered over two positions with site occupancies of 0.869 (9) and 0.131 (9).
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