(Carbonato-j2O,O0)bis(5,50-dimethyl- 2,20-bipyridyl-j2N,N0)cobalt(III) bromide trihydrate

atom completeness 81%; disorder in solvent or counterion; R factor = 0.046; wR factor = 0.145; data-to-parameter ratio = 14.5. In the title complex, [Co(CO3)(C12H12N2)2]Br3H2O, the CoIII cation has a distorted octahedral coordination environment. It is chelated by four N atoms of two different 5,50-dimethyl-2,20-bipyridyl (dmbpy) ligands in axial and equatorial positions, and by two O atoms of a carbonate anion completing the equatorial positions. Although the water molecules 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 – stacking interactions between adjacent pyridine rings of the dmbpy ligands, with centroid–centroid distances of 3.694 (3) and 3.7053 (3) Å. Related literature For background to this class of compounds, see: Momeni et al