Received 10 November 2007
In the title compound, [Co(C4H7N2O2)Cl2(C4H8N2O2)], the CoIII ion has a distorted octahedral coordination environment. The equatorial plane consists of four N atoms, two each from the dimethylglyoxime and dimethylglyoximate ligands, while the two axial positions are occupied by two chloride ions. Strong intramolecular O-HO hydrogen bonds are observed between the dimethylglyoxime and dimethylglyoximate ligands. Molecules are linked into a chain running along the  direction by O-HO and C-HCl hydrogen bonds. The chains are cross-linked through intermolecular C-HCl hydrogen bonds.
Data collection: APEX2 (Bruker-Nonius, 2004); cell refinement: APEX2; data reduction: SAINT (Bruker-Nonius, 2004); program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: ORTEP-3 (Farrugia, 1997); software used to prepare material for publication: SHELXL97 and PLATON (Spek, 2003).
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: CI2517 ).
The authors are grateful to Dr S. Ramanathan, Principal, Presidency College (Autonomous), Chennai, India, and Rev. Fr A. Albert Muthumalai, S. J., Principal, Loyola College (Autonomous), Chennai, India, for providing the necessary facilities. The Head, SAIF, CDRI, Lucknow, India, is thanked for supplying the elemental analysis data and the Head, SAIF, IIT Madras, Chennai, India, for recording the NMR spectra and for the X-ray data collection.
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