Coordination Polymers Ca(II)–Cr(III) and Ba(II)–Cr(III) with Cyclobutane-1,1-dicarboxylic Acid Anions

IF 1.1 3区化学 Q4 CHEMISTRY, INORGANIC & NUCLEAR

Russian Journal of Coordination Chemistry Pub Date : 2024-11-07 DOI:10.1134/S1070328424600566

E. S. Bazhina, M. A. Shmelev, M. A. Kiskin, I. L. Eremenko

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Abstract

The reactions of Cr(NO₃)₃·9H₂O with barium and calcium salts of cyclobutane-1,1-dicarboxylic acid (H₂Cbdc) in a ratio of 1 : 3 in an aqueous solution are studied. The reaction products isolated in the crystalline state are shown to be compounds formed by the binuclear tetraanionic units [Cr₂(OH)₂(Cbdc)₄]^4–, and the nature of the alkaline-earth metal ion introduced into the synthesis affects the dimensionality of the formed polymeric structure. The 2D polymeric compound {[Ba₂Cr₂(OH)₂(Cbdc)₄(H₂O)₅]·3H₂O}_n (I) is formed in the reaction with Ba(Cbdc), and the replacement of Ba²⁺ by Ca²⁺ results in the formation of the 1D coordination polymer {[Ca₂Cr₂(OH)(Cbdc)₄(H₂O)₆]·8H₂O}_n (II). The crystal structures of compounds I and II are determined by single-crystal XRD (CIF files CCDC nos. 2344872 (I) and 2344873 (II), respectively).

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Ca(II)-Cr(III) 和 Ba(II)-Cr(III) 与环丁烷-1,1-二羧酸阴离子的配位聚合物

研究了 Cr(NO3)3-9H2O 与环丁烷-1,1-二羧酸 (H2Cbdc) 的钡盐和钙盐以 1 : 3 的比例在水溶液中发生的反应。结果表明，在结晶状态下分离出的反应产物是由双核四阴离子单元 [Cr2(OH)2(Cbdc)4]4- 形成的化合物，而合成过程中引入的碱土金属离子的性质会影响所形成的聚合物结构的维度。与 Ba(Cbdc) 反应生成二维聚合物{[Ba2Cr2(OH)2(Cbdc)4(H2O)5]-3H2O}n (I)，而用 Ca2+ 取代 Ba2+ 则形成一维配位聚合物{[Ca2Cr2(OH)(Cbdc)4(H2O)6]-8H2O}n (II)。化合物 I 和 II 的晶体结构是通过单晶 XRD 确定的（CIF 文件 CCDC 编号分别为 2344872（I）和 2344873（II））。

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来源期刊

Russian Journal of Coordination Chemistry 化学-无机化学与核化学

CiteScore

2.40

自引率

15.80%

发文量

审稿时长

7.2 months

期刊介绍： Russian Journal of Coordination Chemistry is a journal that publishes reviews, original papers, and short communications on all aspects of theoretical and experimental coordination chemistry. Modern coordination chemistry is an interdisciplinary science that makes a bridge between inorganic, organic, physical, analytical, and biological chemistry.