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化学学报
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化学学报 ›› 2001, Vol. 59 ›› Issue (8): 1294-1298. 上一篇    下一篇

研究论文

二(μ-叠氮)二[N,N'-二(2-吡啶甲基)乙二胺]合二镍(Ⅱ)配 合物的结构与磁性

高恩庆;廖代正;姜宗慧;阎世平;张淑芳   

  1. 曲阜师范大学化学系.曲阜(273165);南开大学化学系.天津(300071)
  • 发布日期:2001-08-15

Strcture and magnetic properties of bis(μ-azido) bis [N,N'-bis(2- pyridylmethyl)ethylenediamine]dinickel(Ⅱ) complex

Gao Enqing;Liao Daizheng;Jiang Zonghui;Yan Shiping;Zhang Shufang   

  1. Qufu Normal Univ, Dept Chem.Qufu(273165);Nankai Univ, Dept Chem. Tianjin(300071)
  • Published:2001-08-15

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合成并通过元素分析、红外光谱、电子光谱等方法表征了叠氮桥联的双核配合物[Ni2(bispicen)2(μ-N3)2](ClO4)2[bispicen=N,N'-二(2-吡啶甲基)乙二胺].用单晶X射线衍射技术测定了配合物的晶体结构，晶体属正交晶系，P212121空间群，镍(Ⅱ)离子处于变形八面体配位环境,并采取cis-α构型，两个以μ-1,3桥联方式配位的叠氮离子之间呈罕见的交错式非平面排列。变温磁化率测定表明配合物两个镍(Ⅱ)离子之间存在反铁磁相互作用，基于H^=-2JS1^S2^的磁性分析表明磁交换积分J=-28.1cm^-1。

关键词: 叠氮络合物, 反铁磁性, 双核配合物, 吡啶P, 乙二胺P, 磁性, 镍络合物, 晶体结构

A binuclear nickel(Ⅱ) complex of [Ni2(bispicen)2(μ-N3)2] (ClO4)2 [bispicen=N,N'-bis (2-pyridylmethyl)ethylenediamine] has been synthesized and characterized by means of elemental analysis, IR and electronic spectra. The crystal structure was determined by single- crystal X-ray diffraction technology. The complex crystallizes in orthorhombic space group P212121.The nickel(Ⅱ) ion resides in a pseudo- octahedral environment with a cis-α configuration. The azidoligand bridges two Ni(Ⅱ) ions in the μ-1,3(end-to-end) mode, and unlike most polynuclear complexes with double μ-1,3-N3 bridges, where the (N3)2 bridging moiety forms a plane, the two azido bridges in the present complex are non-coplanar and crossed at an angle of 49. 7°. The temperature dependence of the manetic susceptibility of the complex has been investigated and revealed an antiferromagnetic interaction between the two Ni(Ⅱ) ions with the exchange integral J=- 28.1 cm^-1(based on H^=-2JS1^S2^).

Key words: AZIDO COMPLEX, ANTIFERROMAGNETISM, DINUCLEAR COMPLEX, PYRIDINE P, ETHANEDIAMINE P, MAGNETISM, NICKEL COMPLEX, CRYSTAL STRUCTURE

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