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化学学报
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化学学报 ›› 1999, Vol. 57 ›› Issue (9): 998-1003. 上一篇    下一篇

研究论文

新型二维草酸根桥联配合物 {[Cu(en)~2]~4[KFe(C~2O~4)~3]~4}~n的合成、结构 和磁性

杨光明;寇会忠;廖代正;姜宗慧;阎世平;王耕霖;姚心侃;王宏根   

  1. 南开大学化学系.天津(300071);南开大学吸附分离功能高分子材料国家重点实 验室;南开大学中心实验室.天津(300071)
  • 发布日期:1999-09-15

A novel two-dimensional oxalate-bridged complex {[Cu(en)~2]~4[KFe^Ⅲ (C~2O~4)~3]~4}~n synthesis, structure and magnetic properties

Yang Guangming;Kou Huizhong;Liao Daizheng;Jiang Zonghui;Yan Shiping;Wang Genglin;Yao Xinkan;Wang Honggen   

  1. Nankai Univ, Dept Chem.Tianjin(300071);Nankai Univ, Ctr Lab.Tianjin (300071)
  • Published:1999-09-15

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合成了一个新型草酸根桥联的二维配合物{[Cu(en)~2]~4[KFe(C~2O~4)~3]~4}~n,并进行了晶体结构测试和磁性研究。晶体结构分析显示:K^+离子为罕见的八配位环境,2个C~2O~4^2^-和2个或1个K^+离子长程桥联2个Fe^Ⅲ离子,形成一个二维网状的[KFe(C~2O~4)~3]~n^2^n^-骨架,[Cu(en)~2]^2^+单元通过(en)N-H...O(C~2O~4)氢键与[KFe(C~2O~4)~3]~n^2^n^-骨架连接。变温磁化率测量表明:Fe^Ⅲ与Fe^Ⅲ间存在着弱的磁相互作用,J=-0.17cm^-^1。

关键词: 晶体结构, 磁性, 氢键, 二维配合物, 多维多核化合物, 草酸根络合物, 乙二胺, 铜化合物, 铁化合物, 钾化合物

A novel two-dimensional oxalate-bridged complex {[Cu(en)~2]~4[KFe (C~2O~4)~3]~4}~n has been synthesized and structurally and magnetically and magnetically characterized. In this complex the eight-coordinate environment of K^+ ions leads to a unique structural arrangement with two C~2O~4^2^- bridges and two or one K^+ ion linking pairs of Fe^Ⅲ ions. As a consequence, a novel 2D[KFe(C~2O~4) ~3]~n^2^n^- network forms. Another feature of the structure is the presence of hydrogen bonding connecting the Cu(en)~2^2^+ entities and [KFe(C~2O~4)~3]~n^2^n^- network through (en)N-H...O(C~2O~4). The magnetic susceptibility data good fits to the experimental data from room temperature to 4.2K were obtained for J=-0.17cm^-^1.

Key words: CRYSTAL STRUCTURE, MAGNETISM, HYDROGEN BONDS, OXALATO COMPLEX, ETHANEDIAMINE, COPPER COMPOUNDS, IRON COMPOUNDS, POTASSIUM COMPOUNDS

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