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Volume 65 
Part 2 
Page m150  
February 2009  

Received 29 September 2008
Accepted 25 December 2008
Online 8 January 2009

Key indicators
Single-crystal X-ray study
T = 293 K
Mean [sigma](C-C) = 0.009 Å
Disorder in main residue
R = 0.034
wR = 0.078
Data-to-parameter ratio = 12.8
Details
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Tetrakis([mu]-2,4-difluorobenzoato)bis[(2,2'-bipyridine)(2,4-difluorobenzoato)terbium(III)]

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: lujianghao001@yahoo.com.cn

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.

Related literature

For related literature on the biological applications of carboxylates as ligands, see, for example: Serre et al. (2005[Serre, C., Marrot, J. & Ferey, G. (2005). Inorg. Chem. 44, 654-658.]).

[Scheme 1]

Experimental

Crystal data
  • [Tb2(C7H3F2O2)6(C10H8N2)2]

  • Mr = 1572.77

  • Triclinic, [P \overline 1]

  • a = 11.401 (1) Å

  • b = 12.189 (1) Å

  • c = 12.588 (2) Å

  • [alpha] = 103.99 (2)°

  • [beta] = 102.90 (2)°

  • [gamma] = 113.58 (2)°

  • V = 1451.5 (3) Å3

  • Z = 1

  • Mo K[alpha] radiation

  • [mu] = 2.52 mm-1

  • T = 293 (2) K

  • 0.44 × 0.26 × 0.20 mm

Data collection
  • Bruker APEXII CCD diffractometer

  • Absorption correction: multi-scan (SADABS; Bruker, 2001[Bruker (2001). SADABS and SAINT-Plus. Bruker AXS Inc., Madison, Wisconsin, USA.]) Tmin = 0.403, Tmax = 0.632

  • 8233 measured reflections

  • 5557 independent reflections

  • 4813 reflections with I > 2[sigma](I)

  • Rint = 0.0210

Refinement
  • R[F2 > 2[sigma](F2)] = 0.034

  • wR(F2) = 0.078

  • S = 1.03

  • 5557 reflections

  • 434 parameters

  • H-atom parameters constrained

  • [Delta][rho]max = 0.60 e Å-3

  • [Delta][rho]min = -0.57 e Å-3

Table 1
Selected bond lengths (Å)

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[Bruker (2004). APEX2. Bruker AXS Inc., Madison, Wisconsin, USA.]); cell refinement: SAINT-Plus (Bruker, 2001[Bruker (2001). SADABS and SAINT-Plus. Bruker AXS Inc., Madison, Wisconsin, USA.]); data reduction: SAINT-Plus; program(s) used to solve structure: SHELXS97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); program(s) used to refine structure: SHELXL97 (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); molecular graphics: SHELXTL (Sheldrick, 2008[Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.]); software used to prepare material for publication: SHELXTL.


Supplementary data and figures for this paper are available from the IUCr electronic archives (Reference: HB2812 ).


Acknowledgements

This work was supported by the Natural Science Foundation of Shandong Province (grant No. Y2007D39).

References

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.  [ISI] [CSD] [CrossRef] [PubMed] [ChemPort]
Sheldrick, G. M. (2008). Acta Cryst. A64, 112-122.  [CrossRef] [details]


Acta Cryst (2009). E65, m150  [ doi:10.1107/S1600536808043936 ]

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