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

Tetrakis(-2,4-difluorobenzoato)bis[(2,2'-bipyridine)(2,4-difluorobenzoato)terbium(III)]

L. Hao and X. Liu

Abstract: In the centrosymmetric dinuclear title compound, [Tb₂(C₇H₃F₂O₂)₆(C₁₀H₈N₂)₂], the Tb^III 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 Tb^III 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.

Online 8 January 2009

Copyright © International Union of Crystallography
IUCr Webmaster