title: (Carbonato-κ(2)O,O')bis-(5,5'-dimethyl-2,2'-bipyridyl-κ(2)N,N')cobalt(III) bromide trihydrate.
abstract: In the title complex, [Co(CO(3))(C(12)H(12)N(2))(2)]Br·3H(2)O, the Co(III) cation has a distorted octa-hedral coordination environment. It is chelated by four N atoms of two different 5,5'-dimethyl-2,2'-bipyridyl (dmbpy) ligands in axial and equatorial positions, and by two O atoms of a carbonate anion completing the equatorial positions. Although the water mol-ecules are disordered and their H atoms were not located, there are typical O⋯O distances between 2.8 and 3.0 Å, indicating O-H⋯O hydrogen bonding. The crystal packing is consolidated by C-H⋯O and C-H⋯Br hydrogen bonds, as well as π-π stacking inter-actions between adjacent pyridine rings of the dmbpy ligands, with centroid-centroid distances of 3.694 (3) and 3.7053 (3) Å.
authors.affiliation: Department of Chemistry, Loyola College (Autonomous), Chennai 600 034,  India.
authors.forename: Kannan
authors.initials: K
authors.lastname: Arun Kumar
authors.forename: Parthsarathi
authors.initials: P
authors.lastname: Meera
authors.forename: Madhavan
authors.initials: M
authors.lastname: Amutha Selvi
authors.forename: Arunachalam
authors.initials: A
authors.lastname: Dayalan