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作者合成和表征了 3个通式为 [Co2 (PMTA)L4 ]的新双核钴 (II)配合物 ,其中 ,PMTA代表均苯四甲酸根四价阴离子 ,L分别为邻苯二胺 (obda)、2 二甲氨基乙胺 (Me2 en)和 3 二甲氨基丙胺 (Me2 pn) .根据元素分析、摩尔电导测定、红外和电子光谱等手段 ,已推定这些配合物具有均苯四甲酸根桥联的双核钴 (II)结构 ,其中 ,两个钴 (II)离子均处于畸变的八面体配位环境 .作者还测定并解析了配合物 [Co2 (PMTA) (Me2 pn) 4]的变温 (4～ 30 0K)磁化率 ,求得交换积分J =- 0 .2 8cm-1.根据实验结果作者认为 ,在双核钴 (II)配合物中的钴 (II)离子间存在极弱的反铁磁自旋超交换作用
The authors synthesized and characterized three novel binuclear cobalt (II) complexes of the general formula [Co2 (PMTA) L4], in which PMTA represents the pyromellitates tetravalent anions and L is the ortho-phenylenediamine (obda) , 2 dimethylaminoethylamine (Me2 en) and 3 dimethylaminopropylamine (Me2 pn) .According to elemental analysis, molar conductivity detection, infrared and electron spectroscopy and other means, it has been assumed that these complexes have pyromellitic acid bridge (II), in which both cobalt (II) ions are in a distorted octahedral coordination environment. The authors also determined and resolved the temperature dependence of the complex [Co2 (PMTA) (Me2 pn) 4] ~ 30 0K) magnetic susceptibility, to obtain the exchange integral J = - 0 .2 8cm-1. According to the experimental results, the authors believe that in the binuclear cobalt (II) complex cobalt ions exist very weak antiferromagnetic Spin ultra-exchange effect