9-(2,6-Dibromo­phenoxy­carbonyl)-10-methyl­acridinium 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 π–π inter­actions (between the benzene rings). These layers, in turn, are linked via a network of five multidirectional π–π 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)°.

(3,5-Dimethyl­pyridine)bis­(tri-tert-butoxysilanethiol­ato)zinc(II)

The title compound, [Zn(C₁₂H₂₇O₃SSi)₂(C₇H₉N)], is a mol­ecular zinc thiol­ate containing, as an additional ligand, 3,5-dimethyl­pyridine. The Zn^II ion coordination is distorted trigonal-bipyramidal, formed by two S, two O and one N atom, with the Zn atom lying on a twofold rotation axis. Mol­ecules pack as discrete units, with no inter­molecular contacts shorter than those arising from van der Waals forces.

2,6-Dibromo­phenyl acridine-9-carboxyl­ate

Adjacent mol­ecules of the title compound, C₂₀H₁₁Br₂NO₂, are oriented either parallel or antiparallel; in the latter case, there are four inter­molecular π–π inter­actions between acridine rings. The acridine and benzene ring systems are inclined at an angle of 41.2 (2)° to each other. There is also a short inter­molecular Br...Br contact.