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

The title compound, C9H12NO+·Br−·CBr4, 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 R22(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.