9-(Biphenyl-4-yl-oxycarbon-yl)-10-methyl-acridinium trifluoro-methane-sulfonate

10-Methyl-9-phenoxy-carbonyl-acridinium trifluoro-methane-sulfonate monohydrate

In the crystal structure of the title compound, C₂₁H₁₆NO₂⁺·CF₃SO₃⁻·H₂O, the anions and the water mol­ecules are linked by O—H⋯O inter­actions, while the cations form inversion dimers through π–π inter­actions between acridine ring systems. These dimers are linked by C—H⋯O and C—F⋯π inter­actions to adjacent anions, and by C—H⋯π inter­actions to neighboring cations. The water mol­ecule links two H atoms of the cation by C—H⋯O inter­actions and two adjacent anions by O—H⋯O inter­actions. The acridine and benzene ring systems are oriented at 15.6 (1)°. The carboxyl group is twisted at an angle of 77.0 (1)° relative to the acridine skeleton. The mean planes of the adjacent acridine units are either parallel or inclined at an angle of 18.4 (1)°.

Acridinium 3,5-dicarboxy-benzoate monohydrate

The title compound, C(13)H(10)N(+)·C(9)H(5)O(6) (-)·H(2)O, exhibits a wide range of non-covalent inter-actions, such as O-H⋯O and N-H⋯O hydrogen bonds, π-π stacking [centroid-centroid distances = 3.562 (8) and 3.872 (8) Å] and ion pairing, connecting the various components into a supra-molecular structure.