Crystal structure and Hirshfeld surface analysis of a supramolecular aggregate of 4-formyl-N,N-dimethylanilinium bromide with tetrabromomethane

The title compound, C 9 H 12 NO + ·Br − ·CBr 4 , consists of one 4-formyl- N , N -dimethylbenzenaminium bromide and a tetrabromomethane molecule. In the crystal, the bromide ions link 4-formyl- N , N -dimethylbenzenaminium moieties through intermolecular C—H...Br and N—H...Br hydrogen bonds, while intermolecular C—H...O hydrogen bonds link 4-formyl- N , N -dimethylbenzenaminium cations, enclosing R 2 2 (18) ring motifs, into a di-periodic network structure. The tetrabromomethane molecules fill the spaces between the layers. Neither π–π nor C—H...π(ring) interactions are observed. A Hirshfeld surface analysis of the crystal structure indicates that the most abundant contacts contributing to the crystal packing are from H...Br/Br...H (56.0%), Br...Br (12.1%), H...O/O...H (9.7%) and H...H (9.5%) interactions.