Received 29 September 2008
Accepted 25 December 2008
Online 8 January 2009
|Single-crystal X-ray study|
|T = 293 K|
|Mean (C-C) = 0.009 Å|
|Disorder in main residue|
|R = 0.034|
|wR = 0.078|
|Data-to-parameter ratio = 12.8|
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aCollege of Food and Biological Engineering, Shandong Institute of Light Industry, Jinan 250353, People's Republic of China, and bMaize Research Institute, Shandong Academy of Agricultural Science, Jinan 250100, People's Republic of China
Correspondence e-mail: email@example.com
In the centrosymmetric dinuclear title compound, [Tb2(C7H3F2O2)6(C10H8N2)2], the TbIII ion is coordinated by an N,N'-bidentate 2,2'-bipyridine molecule, and two O,O'-bidentate 2,4-difluorobenzoate (dfb) anions. One of the latter also bonds to the second TbIII centre through one of its O atoms. The third dfb anion bonds to one Tb atom from each of its O atoms. Thus, the three dfb species have three different coordination modes. This results in an irregular TbN2O7 coordination sphere for the metal ion. The F atoms and their associated H atoms in the simple bidentate dfb anion are disordered over two sets of sites in a 0.672 (10):0.328 (10) ratio.
For related literature on the biological applications of carboxylates as ligands, see, for example: Serre et al. (2005).
Bruker APEXII CCD diffractometer
Absorption correction: multi-scan (SADABS; Bruker, 2001) Tmin = 0.403, Tmax = 0.632
8233 measured reflections
5557 independent reflections
4813 reflections with I > 2(I)
Rint = 0.0210
|Tb1-N1 ||2.565 (3) |
|Tb1-N2 ||2.586 (4) |
|Tb1-O6i ||2.364 (3) |
|Tb1-O3i ||2.377 (3) |
|Tb1-O5 ||2.379 (3) |
|Tb1-O2 ||2.418 (3) |
|Tb1-O4 ||2.481 (3) |
|Tb1-O1 ||2.498 (3) |
|Tb1-O3 ||2.696 (3) |
|Symmetry code: (i) -x+1, -y+2, -z+1. |
Data collection: APEX2 (Bruker, 2004); cell refinement: SAINT-Plus (Bruker, 2001); data reduction: SAINT-Plus; 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: HB2812 ).
This work was supported by the Natural Science Foundation of Shandong Province (grant No. Y2007D39).
Bruker (2001). SADABS and SAINT-Plus. Bruker AXS Inc., Madison, Wisconsin, USA.
Bruker (2004). APEX2. Bruker AXS Inc., Madison, Wisconsin, USA.
Serre, C., Marrot, J. & Ferey, G. (2005). Inorg. Chem. 44, 654-658.
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.
Acta Cryst (2009). E65, m150 [ doi:10.1107/S1600536808043936 ]