Received 19 February 2009
In the title complex, [Co(C10H11N2O2)2(C5H5N)2], the CoII atom lies on a centre of symmetry and adopts a distorted cis-CoO2N4 octahedral geometry. The two acetone salicyloylhydrazone ligands are deprotonated and act as N,O-bidentate monoanionic ligands, forming the equatorial plane, while the axial positions are occupied by two N atoms of two pyridine molecules. The complex presents O-HN and C-HN intramolecular hydrogen bonds. Intermolecular C-HN and C-HO interactions are also present in the crystal.
For the crystal structure of acetone salicylhydrazone, see: Kraudelt et al. (1996). For the crystal structure of iron and nickel complexes with related aroylhydrazone derivatives, see: Matoga et al. (2007) and Liu et al. (2005), respectively. For the biological activity of aroylhydrazones, see: Armstrong et al. (2003). For the crystal structure of 3-hydroxy-N-[phenyl(2-pyridyl)methylene]-2-naphthohydrazide, see: Kang et al. (2007).
Data collection: SMART (Siemens, 1996); cell refinement: SAINT (Siemens, 1996); data reduction: SAINT; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008); molecular graphics: SHELXTL (Sheldrick, 2008); software used to prepare material for publication: SHELXTL.
Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: BG2240 ).
We acknowledge the financial support of the National Natural Science Foundation of China (20671048).
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