氯冉酸根桥联的双核铬(III)配合物的合成与磁性研究(英文)  

STUDIES ON SYNTHESIS AND MAGNETIC PROPERTY OF CHLORANILATO BRIDGED BINUCLEAR CHROMIUM(Ⅲ) COMPLEXES

作　　者：李延团[1] 张玉华[2] 汪海东[1] 曾宪诚[1] 

机构地区：[1]四川大学化学学院,成都610064 [2]曲阜师范大学,山东曲阜273165

出　　处：《四川大学学报（自然科学版）》2001年第5期702-707,共6页Journal of Sichuan University(Natural Science Edition)

基　　金：heNationalNaturalScienceFoundationofChina(2 98730 31)

摘　　要：合成和表征了以氯冉酸根 (CA)为桥联体 ,分别端接 1,2 丙二胺 (ap)、2 二甲氨基乙胺 (Me2 en)和 3 二甲氨基丙胺(Me2 pn) 3种新的双核铬 (III)配合物 [Cr2 (CA)L4 ](SO4 ) 2 [L =ap ,Me2 en ,Me2 pn].基于元素分析、摩尔电导和室温磁化率的测定以及红外和电子光谱等手段 ,已推定这些配合物具有氯冉酸根桥联的双核铬 (III)结构 ,其中 ,每个铬 (III)离子均处于畸变的八面体配位环境 .测定并研究了配合物 [Cr2 (CA) (Me2 pn) 4](SO4 ) 2 的变温 (4 .2～ 30 0K)磁化率 ,求得交换积分J =-4.79cm-1.结果表明 ,双核配合物中铬 (III)Three new binuclear chromium(III) complexes bridged by chloranilato (CA) and end capped with 1,2 diaminopropane (ap); 2 dimethylaminoethylamine (Me 2en) or 3 dimethylaminopropylamine (Me 2pn), [Cr 2(CA)L 4] (SO 4) 2 [L = ap, Me 2en, Me 2pn], have been synthesized and characterized by elemental analyses, molar conductivity and magnetic moments at room temperature, IR and electronic spectra. It is proposed that these complexes have CA bridged structures and consist of two chromium(III) ions, each in a distorted octahedral environment. The variable temperature magnetic susceptibility of complex [Cr 2(CA)(Mepn) 4](SO 4) 2 was measured and studied in the 4.2～300 K range, giving the exchange integral J =-4.79 cm -1 . This result indicates that there is a weak antiferromagnetic spin exchange interaction between the two chromium(III) ions.

关 键 词：合成 μ-氯冉酸桥 双核配合物 铬 磁性 铬配合物 

分 类 号：O614.611[理学—无机化学]