title: Bis(2,6-dimethyl-pyridinium) tetra-bromido-cobaltate(II).
abstract: In the crystal structure of the title compound, (C(7)H(10)N)(2)[CoBr(4)], the [CoBr(4)](2-) anion is connected to two cations through N-H⋯Br and H(2)C-H⋯Br hydrogen bonds to form two-dimensional cation-anion-cation layers normal to the crystallographic b axis. Inter-actions of the π-π type are absent between cations in the stacks [centroid-centroid separation = 5.01 (5) Å]. Significant inter-molecular Br-aryl inter-actions are present in the structure, especially an unusually short Br-ring centroid inter-action of 3.78 (1) Å. The coordination geometry of the anion is approximately tetrahedral and a twofold rotation axis passes through the Co atom.
authors.forename: Basem Fares
authors.initials: BF
authors.lastname: Ali
authors.forename: Rawhi H
authors.initials: RH
authors.lastname: Al-Far
authors.forename: Salim F
authors.initials: SF
authors.lastname: Haddad