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首页> 外文期刊>Zeitschrift fur Anorganische und Allgemeine Chemie >Benzene trisulfonic acid (H_3BTS) as analogue of trimesic acid for building open frameworks: The first rare earth examples [La(BTS)(H _2O)_5] and [RE(BTS)(H_2O)_4] (RE = Nd, Sm, Eu)
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Benzene trisulfonic acid (H_3BTS) as analogue of trimesic acid for building open frameworks: The first rare earth examples [La(BTS)(H _2O)_5] and [RE(BTS)(H_2O)_4] (RE = Nd, Sm, Eu)

机译：苯甲磺酸（H_3BTS）作为均苯三酸的类似物，用于构建开放式骨架：第一个稀土实例[La（BTS）（H _2O）_5]和[RE（BTS）（H_2O）_4]（RE = Nd，Sm，欧盟）

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摘要

The reaction of benzene 1,3,5-trisulfonic acid (H_3BTS) with the hydroxides RE(OH)_3 (RE = La, Nd, Sm, Eu) in aqueous solution afforded the sulfonates [La(BTS)(H_2O)_5] and [RE(BTS)(H _2O)_4] (RE = Nd, Sm, Eu). Single crystal investigations were performed for the lanthanum and the europium compound, respectively. [La(BTS)(H_2O)_5] is triclinic [P|{1}, Z = 2, a = 783.18(6) pm, b = 1056.94(8) pm, c = 1082.38(8) pm, α = 114.860(2)°, β = 96.655(3)°, γ = 104.402(3)°] whereas [Eu(BTS)(H_2O) _4] exhibits monoclinic symmetry [P2_1, Z = 4, a = 767.61(5) pm, b = 1730.2(1) pm, c = 1134.06(8) pm, β = 108.375(8)°]. Despite these crystallographic differences, the structural features of the lanthanum and europium compounds are very similar. They show the metal ions connected by BTS anions to layers that are further linked by hydrogen bonds. Interestingly, only two of the three sulfonate groups are connected to rare earth ions, whereas the third remains uncoordinated and acts as acceptor within the hydrogen bonds. According to powder XRD measurements the neodymium and samarium sulfonates are isotypic with the europium compound. The thermal analyses of the compounds show the dehydration in a temperature range between 100 and 300 °C, whereas the decomposition of the organic ligands takes place at temperatures as high as 550 °C. Thus the anhydrous sulfonates are much more stable than comparable salts of trimesic acid. The residues of the thermal decompositions were identified by XRD experiments.
机译：苯1,3,5-三磺酸（H_3BTS）与氢氧化物RE（OH）_3（RE = La，Nd，Sm，Eu）在水溶液中的反应得到磺酸盐[La（BTS）（H_2O）_5]和[RE（BTS）（H _2O）_4]（RE = Nd，Sm，Eu）。分别对镧和the化合物进行了单晶研究。 [La（BTS）（H_2O）_5]是斜线[P | {1}，Z = 2，a = 783.18（6）pm，b = 1056.94（8）pm，c = 1082.38（8）pm，α= 114.860 （2）°，β= 96.655（3）°，γ= 104.402（3）°]，而[Eu（BTS）（H_2O）_4]显示出单斜对称性[P2_1 / n，Z = 4，a = 767.61（5） pm，b ＝ 1730.2（1）pm，c ＝ 1134.06（8）pm，β＝ 108.375（8）°]。尽管存在这些晶体学差异，但是镧和euro化合物的结构特征非常相似。它们显示了BTS阴离子将金属离子连接到通过氢键进一步连接的层上。有趣的是，三个磺酸盐基团中只有两个与稀土离子相连，而第三个则保持不配位并充当氢键内的受体。根据粉末XRD测量，钕和sa磺酸盐与with化合物同型。化合物的热分析表明在100至300°C的温度范围内会发生脱水，而有机配体的分解会在高达550°C的温度下发生。因此，无水磺酸盐比可比苯三酸的盐稳定得多。通过XRD实验鉴定热分解的残余物。

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