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四溴代邻苯二甲酸根桥联的双核钴(Ⅱ)配合物的合成和表征 预览

Synthesis and Magnetism of Tetrabromophthalato-Bridged Cobalt(Ⅱ) Binuclear Complexes
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摘要 合成和表征了4种以四溴代邻苯二甲酸根阴离子(4Br-PHTH)桥联,以1,10-菲咯啉(phen),5-硝基-1,10-菲咯啉(NO2-phen)2,2’-联吡啶(bpy)和4,4’-二甲基-2,2’-联吡啶(Me2bpy)端枝的双核站(II)配合物(Co2(4Br-PHTH)(L)4)(ClO4)(L=phen(1),NO2-phen(2),bpy(3),Me2bpy(4)。基于IR光谱,元素分 Four novel cobalt(Ⅱ) complexes have been synthesized and characterized,namely[Co_2(4Br-PHTH)(L)_4](ClO_4)_2(L denotes 1,10-phenanthroline(phen)(1),5-nitro-1,10-phenanthroline(NO_2-phen) (2),2,2'-bipyridyl(bpy)(3) and 4,4'-dimethyl-2,2'-bipyridyl(Me_2bpy)(4),respectively),where 4Br-PHTH is the tetrabromophthalate anion. Based on IR,elemental analysis and conductivity measurements,these complexes are proposed to have extended tetrabromophthalato-bridged structure consisting of two cobalt ions in which each cobalt(Ⅱ) ion has a distorted octahedral environment.The temperature dependence of the magnetic susceptibility for all the complexes were measured over the range 75~300 K and the observed data were successfully simulated by an equation based on the spin Hamiltonian operator(H=-2JS_1·S_2),giving the exchange integral J=-0.87 cm ̄(-1),J=-0.84cm ̄(-1)(2),J=-0.82 cm ̄(-1)(3) and J=-0.85 cm ̄(-1)(4).These results indicate the existence of weak antiferromagnetic spin exchange interaction between the metal ions.
作者 缪明明 孙献茹 Miao Mingming;Sun Xianru;Shi Jingmin;Liao Daizheng;Jiang Zonghui;Wang Genglin(Department of Chemistry,Nankai University,Tianjin 300071)
机构地区 南开大学化学系
出处 《应用化学》 CAS CSCD 北大核心 1996年第1期 43-46,共4页 Chinese Journal of Applied Chemistry
基金 南京大学配位化学国家重点实验室资助
关键词 配合物 磁化率 邻苯二甲酸根 溴代 binuclear complex,Co(Ⅱ)-Co(Ⅱ),antiferromagnetic interaction
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参考文献2

  • 1Ma S L,Synth React Inorg Met.Org Chem,1993年,23卷,239页 被引量:1
  • 2Deng Z L,Polyhedron,1992年,11卷,885页 被引量:1
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