首页> 美国卫生研究院文献>Acta Crystallographica Section E: Crystallographic Communications >Crystal structures of the potassium and rubidium salts of (35-di­chloro­phen­oxy)acetic acid: two isotypic coordination polymers
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Crystal structures of the potassium and rubidium salts of (35-di­chloro­phen­oxy)acetic acid: two isotypic coordination polymers

机译:(35-二氯氯苯氧基)乙酸的钾盐和rub盐的晶体结构:两种同型配位聚合物

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摘要

The two-dimensional coordination polymeric structures of the hydrated potassium and rubidium salts of (3,5-di­chloro­phen­oxy)acetic acid (3,5-D), namely, poly[μ-aqua-bis­[μ3-2-(3,5-di­chloro­phen­oxy)acetato]­dipotassium], [K2(C8H5Cl2O3)2(H2O)]n, and poly[μ-aqua-bis­[μ3-2-(3,5-di­chloro­phen­oxy)acetato]­dirubidium], [Rb2(C8H5Cl2O3)2(H2O)]n, respectively, have been determined and are described. The two compounds are isotypic and the polymeric structure is based on centrosymmetric dinuclear bridged complex units. The irregular six-coordination about the alkali cations comprises a bridging water mol­ecule lying on a twofold rotation axis, the phen­oxy O-atom donor and a triple bridging carboxyl­ate O atom of the oxo­acetate side chain of the 3,5-D ligand, and the second carb­oxy­ate O-atom donor also bridging. The K—O and Rb—O bond-length ranges are 2.7238 (15)–2.9459 (14) and 2.832 (2)–3.050 (2) Å, respectively, and the K⋯K and Rb⋯Rb separations in the dinuclear units are 4.0214 (7) and 4.1289 (6) Å, respectively. Within the layers which lie parallel to (100), the coordinating water mol­ecule forms an O—H⋯O hydrogen bond to the single bridging carboxyl­ate O atom.
机译:(3,5-二氯苯氧基)乙酸(3,5-D)的水合钾盐和rub盐的二维配位聚合物结构,即聚[μ-aqua-bis[μ3-2-(3,5) -[dichlorophenoxy)acetato] dipotassium],[K2(C8H5Cl2O3)2(H2O)] n和聚[μ-aqua-bis[μ3-2-(3,5-dichlorophenoxy)acetato] dirubidium],[Rb2(C8H5Cl2O3)已经确定并描述了2(H 2 O)] n 。这两种化合物是同型的,并且聚合物结构基于中心对称的双核桥联复杂单元。关于碱金属阳离子的不规则六配位包括位于两倍旋转轴上的桥联水分子,3,5-D配体氧代乙酸酯侧链的苯氧基O原子供体和三桥联羧酸根O原子,以及第二个羧酸盐O原子供体也桥接。 K-O和Rb-O键长范围分别为2.7238(15)–2.9459(14)和2.832(2)–3.050(2)Å,双核单元中的K⋯K和Rb⋯Rb间距分别为4.0214(7)和4.1289(6)Å。在平行于(100)的层中,配位水分子与单个桥连羧酸O原子形成OH-H = O氢键。

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