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化学学报
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化学学报 ›› 2007, Vol. 65 ›› Issue (12): 1129-1134. 上一篇    下一篇

研究论文

1,3-丙二胺的不对称双Schiff碱异三核配合物的合成表征、晶体结构与磁性研究

梅崇珍1,2, 陶偌偈*,1, 王庆伦3   

  1. (1河南大学化学化工学院分子与晶体工程研究所 开封 475001)
    (2华北水利水电学院环境工程系 郑州 450008)
    (3南开大学化学系 天津 300071)
  • 投稿日期:2006-09-13 修回日期:2006-11-08 发布日期:2007-06-28
  • 通讯作者: 陶偌偈

Synthesis, Characterization, Crystal Structure and Magnetic Properties of Dissymmetrical Double Schiff Base Heterotrinuclear Complexes with N-3-Carboxylsalicylidene-N'-salicylidene- 1,3-propylenediamine Trivalent Anions

MEI Chong-Zhen1,2; TAO Ruo-Jie*,1; WANG Qing-Lun3   

  1. (1 Institute of Molecular and Crystal Engineering, College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475001)
    (2 Department of Environmental Sciences and Engineering, North China Institute of Water Conservancy and Hydroelectric Power, Zhengzhou 450008)
    (3 Department of Chemistry, Nankai University, Tianjin 300071)
  • Received:2006-09-13 Revised:2006-11-08 Published:2007-06-28
  • Contact: TAO Ruo-Jie

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被引次数

19

合成了一种新的不对称双Schiff碱Cu(II)单核配合物Cu(HLt) (1) (H3Lt为N-3-羧基水杨醛-N'-水杨醛-缩1,3-丙二胺)及其两个异三核配合物[(CuLt)2Ni]•2.5H2O (2)和[(CuLt)2Mn]•5H2O (3), 并用元素分析、红外光谱、电子光谱对它们进行了结构表征. 用X射线单晶衍射法测定了配合物3的晶体结构, 其晶胞中每个不对称单元包含一个异三核中性分子, 在此三核分子中, 中心Mn2＋离子位于[O6]的变形八面体配位环境中, 两个端基Cu2＋离子位于[N2O2]的平面正方场中. 在5～300 K范围内测定了两个三核配合物的变温磁化率, 经拟合得化合物2的磁交换参数为－57.7 cm－1, 化合物3的磁交换参数为－28.5 cm－1, 表明在两个异三核配合物中, 中心M2＋离子与外部Cu2＋离子间存在弱的反铁磁自旋交换作用.

关键词: 不对称双Schiff碱, 异三核配合物, 晶体结构, 磁性质

A new dissymmetrical double Schiff base Cu(II) mononuclear complex: Cu(HLt) (1), where H3Lt is N-3-carboxylsalicylidene-N'-salicylidene-1,3-propylenediamine) and its two heterotrinuclear complexes: [(CuLt)2Ni]•2.5H2O (2) and [(CuLt)2Mn]•5H2O (3) have been synthesized and characterized by means of elemental analyses, IR and electronic spectra. The crystal structure of the complex 3 was determined by X-ray analysis. Each dissymmetrical cell unit of the complex 3 contains one heterotrinuclear neutral molecule, in which the central Mn2＋ ion is located at the site of O6 with a distorted octahedral geometry and two terminal Cu2＋ ions are located at the 4-coordination site of N2O2. The magnetic properties of the two heterotrinuclear complexes have been determined in the temperature range 5～300 K, indicating that the interaction between the central M2＋ ion and the outer Cu2＋ ions is antiferromagnetic. The exchange integrals are equal to －57.7 cm－1 for 2 and －28.5 cm－1 for 3.

Key words: dissymmetrical double Schiff base, heterotrinuclear complex, crystal structure, magnetic property