| Summary: | In the crystal structure of the title compound, C21H15FNO2+·CF3SO3−, the cations form inversion dimers through C—H...O, C—F...π and π–π interactions. These dimers are further linked by π–π interactions. The cations and anions are connected through C—H...O, C—F...π and S—O...π interactions. The acridine and benzene ring systems are oriented at a dihedral angle of 74.1 (1)°. The carboxylate group is twisted at an angle of 4.4 (1)° relative to the acridine skeleton. The mean planes of the adjacent acridine moieties are parallel or inclined at an angle of 55.4 (1)° in the crystal structure.
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