乙二胺四乙酸铜配合物的晶体结构和磁性研究

Crystal Structure and Magnetic Study of Cu(Ⅱ) Coordination Complex Bridged with Ethylenediamine Tetraacetic Acid

合成了以乙二胺四乙酸为配体的单核铜配合物Cu(H2EDTA)(H2O).用X射线衍射单晶分析法测定了配合物的结构,晶体为单斜晶系,属于P21/c晶群,晶胞参数为a=11.633(3),b=7.019 7(15),c=16.562(4),β=92.019(4)°,晶胞数为Z=4.相邻Cu离子之间通过氢键相连进行磁超交换作用,变温磁化率显示配合物为弱的反铁磁交换作用,拟合结果为g=2.14,zj′/k=-1.3 K.

An ethylenediamine tetraacetic acid（EDTA）-bridged coordination complex Cu（H2EDTA）（H2O） has been synthesized and characterized by X-ray crystal structure determination and magnetic studies. The complex crystallizes in the monoclinic system, P2,/c, with α=11. 633（3） A, b=7. 019 7（15） /k, c=16. 562 （4） .A, β= 92. 019（4） °, and Z=4. The magnetic behavior in the temperature range （2-300K） reveals the antiferromagnetic interactions in the two complexes. The magnetic exchange passway is through the hydrogen bonds formed with the neighbor two moleculae. The best fitted parameters for the complex are g=2.14, zj＇/ k=-1. 3K.