title: 2,6-Dimethyl-pyridinium bromide.
abstract: The asymmetric unit of the title salt, C(7)H(10)N(+)·Br(-), comprises two 2,6-dimethyl-pyridinium cations and two bromide anions. One cation and one anion are situated in general positions, while the other cation and the other anion lie on a crystallographic mirror plane parallel to (010). Each pair of ions inter-act via N-H⋯Br and C-H⋯Br hydrogen bonding, generating motifs depending on the cation and anion involved. Thus, the cation and the anion on the mirror plane generate infinite chains along the c axis, while the other ionic pair leads to sheets parallel to the ac plane. In the overall crystal packing, both motifs alternate along the b axis, with a single layer of the chain motif sandwiched between two double layers of the sheet motif. The sheets and chains are further connected via aryl π-π inter-actions [centroid-centroid distances = 3.690 (2) and 3.714 (2) Å], giving a three-dimensional network.
authors.affiliation: Department of Chemistry, The University of Jordan, Amman 11942,  Jordan.
authors.forename: Salim F
authors.initials: SF
authors.lastname: Haddad
authors.forename: Basem F
authors.initials: BF
authors.lastname: Ali
authors.forename: Rawhi
authors.initials: R
authors.lastname: Al-Far