9-(2,6-dibromophenoxycarbonyl)-10-methyl-acridinium trifluoromethanesulfonate

In the title compound, C21H14Br2NO2+.CF3O3S-, adjacent cations are oriented either parallel or antiparallel. Together with the CF3O3S- anions, the antiparallel-oriented cations form layers in which the ions are linked via a network of C - H ...... O (O from the anions) and pi - pi interactions ( between the benzene rings). These layers, in turn, are linked via a network of five multidirectional pi - pi interactions between the acridine rings, and the crystal structure is stabilized by electrostatic interactions between the ions. The acridine and independent benzene rings are mutually oriented at an angle of 35.9 ( 3) degrees.