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一个双核镍配合物[Ni_2(Htda)_2(H_2O)_6]·4H_2O的合成、晶体结构和性质(英文) 被引量:2

A Dinuclear Ni(Ⅱ) Complex [Ni_2(Htda)_2(H_2O)_6]·4H_2O: Synthesis, Crystal Structure and Properties
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摘要 双核金属配合物对于生物化学和磁化学都是非常重要的。在本文中,1,2,3-三氮唑-4,5-二羧酸(H3tda)配体和硝酸镍在常温常压下反应得到了1个三氮唑桥联的双核镍配合物[Ni2(Htda)2(H2O)6]·4H2O(1),并通过元素分析、红外光谱、X-射线单晶衍射、热重分析以及超导量子干涉仪(SQUID)对其晶体结构和磁、热性质进行了表征。晶体数据表明该配合物属三斜晶系,空间群为P1。在配合物1中,2个1,2,3-三氮唑-4,5-二羧酸配体利用2个相邻的氮原子桥联2个金属镍离子形成一个双桥的双核镍配合物。这些双核镍单元又通过体系中存在的大量的氢键相互作用形成了三维超分子骨架。磁性分析显示双核镍单元内镍镍之间存在反铁磁相互作用。 The dinuclear metal complexes are important not only for biochemistry but also for magnetochemistry. In this paper, a dinuclear Ni(Ⅱ) complex [Ni2(Htda)2(H2O)6]·4H2O (1) with 1,2,3-triazole-4,5-dicarboxylic acid (H3tda) as ligands has been synthesized and characterized by element analysis, IR spectra, single-crystal X-ray diffraction, thermo gravimetric analysis and superconducting quantum interference device (SQUID). The crystallographic data shows that complex 1 crystallizes in triclinic space group P1 with a=0.721 19(16) nm, b=0.812 81(18) nm, c= 0.940 2(2) nm, α=109.526(4)°, β=91.868(4)°, γ=103.304(4)°, V=0.501 88(19) nm3, C8H22N6Ni2O18, Mr=607.74, Dc= 2.011 g·cm-3, μ(Mo Kα)=1.982 mm-1, F(000)=312, GOF=1.037, Z=1, the final R1=0.045 1 and wR2=0.117 7 for I2σ(I). In 1, two 1,2,3-triazole-4,5-dicarboxylic acid ligands bridge two Ni(Ⅱ) ions by two neighboring nitrogen atoms in triazole ring to form a dinuclear Ni(Ⅱ) unit, which is further connected with each others through plenty of hydrogen-bond interactions to construct a three-dimensional (3D) supramolecular architecture. The magnetic study shows that the antiferromagnetic interactions exist between Ni(Ⅱ) ions in dinuclear Ni(Ⅱ) units.
作者 周馨慧
出处 《无机化学学报》 SCIE CAS CSCD 北大核心 2010年第5期801-806,共6页 Chinese Journal of Inorganic Chemistry
基金 南京邮电大学引进人才科研启动基金(No.NY209032)资助
关键词 双核镍配合物 1 2 3-三氮唑-4 5-二羧酸 晶体结构 氢键 磁性质 dinuclear Ni(Ⅱ) complex 1 2 3-triazole-4 5-dicarboxylic acid crystal structure hydrogen bond magnetic property
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