RESUMEN
In the title compound, C(20)H(19)N(2) (+)·PF(6) (-), the two benzocyclo-butene units are essentially planar and they form dihedral angles of 38.0â (2) and 72.7â (2)°, with the central imidazolium ring. In the crystal structure, weak C-Hâ¯π and π--π stacking inter-actions [centroid-centroid distance = 3.742â (2)â Å] contribute to the stability of the crystal structure. The PF(6) (-) ion is disordered over two positions with site occupancies of 0.869â (9) and 0.131â (9).
RESUMEN
In the title compound, C(15)H(17)N(2) (+)·Br(-), the cyclo-butene and benzene rings are coplanar. The dihedral angle between the benzene and imidazolium rings is 21.2â (3)°. In the crystal structure, the C(15)H(17)N(2) (+) and Br(-) ions are linked into a zigzag chain along the b axis by C-Hâ¯Br hydrogen bonds, and weak C-Hâ¯π inter-actions involving the benzene ring of a screw-related cation.