Received 4 February 2012
In the title complex, [Co(CO3)(C12H12N2)2]Br·3H2O, the CoIII cation has a distorted octahedral 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 molecules are disordered and their H atoms were not located, there are typical OO distances between 2.8 and 3.0 Å, indicating O-HO hydrogen bonding. The crystal packing is consolidated by C-HO and C-HBr 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.
For background to this class of compounds, see: Momeni et al. (2009); Harding et al. (2008); Kusrini et al. (2008). For applications of this class of compounds in various fields, see: Carol et al. (2006); Eddie et al. (2010); Raj et al. (2008); Vitushkina et al. (2006); Hyung et al. (2006); Jayaweera et al. (2002), Shi et al. (2010); For similar structures, see: Ma et al. (2008); Phatchimkun & Chaichit (2011).
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT (Bruker, 2004); data reduction: SAINT; program(s) used to solve structure: SIR92 (Altomare et al., 1993); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997) and Mercury (Macrae et al., 2008); software used to prepare material for publication: publCIF (Westrip, 2010).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: WM2590 ).
The authors are thankful to Rev. Dr C. Joe Arun, SJ, Secretary, and Rev. Dr B. Jeyaraj, SJ, Principal, Loyola College (Autonomous), Chennai-34, India, for providing the necessary facilities and the Head, SAIF, IIT Madras, Chennai-36, India, for recording the X-ray data.
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