title: 9-(4-Bromo-phenoxy-carbon-yl)-10-methyl-acridinium trifluoro-methane-sulfonate.
abstract: In the crystal structure of the title compound, C(21)H(15)BrNO(2) (+)·CF(3)SO(3) (-), the cations form inversion dimers through π-π inter-actions between the acridine ring systems. These dimers are further linked by C-H⋯π and C-Br⋯π inter-actions. The cations and anions are connected by multidirectional C-H⋯O and C-F⋯π inter-actions. The acridine and benzene ring systems are oriented at 10.8 (1)°. The carboxyl group is twisted at an angle of 85.2 (1)° relative to the acridine skeleton. The mean planes of adjacent acridine units are parallel or almost parallel [inclined at an angle of 1.4 (1)°] in the crystal structure.
authors.affiliation: Faculty of Chemistry, University of Gdańsk, J. Sobieskiego 18, 80-952 Gdańsk, Poland.
authors.forename: Damian
authors.initials: D
authors.lastname: Trzybiński
authors.forename: Karol
authors.initials: K
authors.lastname: Krzymiński
authors.forename: Artur
authors.initials: A
authors.lastname: Sikorski
authors.forename: Jerzy
authors.initials: J
authors.lastname: Błażejowski