Hao Lujiang, Liu Xia
Acta Crystallogr Sect E Struct Rep Online. 2009 Jan 8;65(Pt 2):m150. doi: 10.1107/S1600536808043936.
In the centrosymmetric dinuclear title compound, [Tb(2)(C(7)H(3)F(2)O(2))(6)(C(10)H(8)N(2))(2)], the Tb(III) ion is coordinated by an N,N'-bidentate 2,2'-bipyridine mol-ecule, and two O,O'-bidentate 2,4-difluoro-benzoate (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 TbN(2)O(7) 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.
在中心对称的双核标题化合物[Tb₂(C₇H₃F₂O₂)₆(C₁₀H₈N₂)₂]中，Tb(III)离子由一个N,N'-双齿的2,2'-联吡啶分子和两个O,O'-双齿的2,4-二氟苯甲酸根(dfb)阴离子配位。后者中的一个还通过其一个O原子与第二个Tb(III)中心键合。第三个dfb阴离子从其每个O原子与一个Tb原子键合。因此，这三种dfb物种具有三种不同的配位模式。这导致金属离子的配位球为不规则的TbN₂O₇。简单双齿dfb阴离子中的F原子及其相关的H原子在两组位置上无序，比例为0.672(10):0.328(10)。
