Received 5 November 2012
In the binuclear copper(II) title complex, [Cu2(C9H7O4)4(C2H3N)2], an inversion centre is situtated at the mid-point of the Cu-Cu bond. The CuII atom together with its four coordinated O atoms are in a distorted planar square arrangement while the nitrogen and the other CuII atom are located in apical positions. The whole molecule looks like a paddle-wheel. In the crystal, chains are assembled along the b axis through C-HO hydrogen bonds and slipped - interactions between the benzene rings of neighbouring molecules [centroid-centroid distance = 3.6929 (3) Å and slippage = 0.641 (1) Å].
For a review on related binuclear CuII carboxylato compounds with subnormal magnetic moments, see: Kato et al. (1964). For the electrochemical behavior of related compounds, see: Reinhard et al. (2003). For the synthesis of related compounds, see: Liu et al. (2008).
Data collection: SMART (Bruker, 1999); cell refinement: SAINT (Bruker, 1999); 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: LR2089 ).
The authors thank the National Natural Science Foundation of the People's Republic of China (grant No. 21201024), the Natural Science Foundation of Shanxi Province (grant No. 2012021009-1), and the Scientific Research Foundation for PhDs of Changzhi University.
Bruker (1999). SMART and SAINT. Bruker AXS Inc., Madison, Wisconsin, USA.
Bruker (2001). SADABS. Bruker AXS Inc., Madison, Wisconsin, USA.
Kato, M., Jonassen, H. B. & Fanning, J. C. (1964). Chem. Rev. 64, 99-128.
Liu, T.-H., Huang, L., Chen, F.-J., Xi, P.-X., Xu, Z.-H., Xu, M. & Zeng, Z.-Z. (2008). Anal. Sci. 24, x303-x304.
Reinhard, P., Stefan, L., Carsten, T., Michael, A. O. & Ekkehard, S. (2003). Inorg. Chem. 42, 8230-8240.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.