氯冉酸根桥联双核铬（Ⅲ）配合物的合成与磁性

摘要

合成了3种新的双核铬(Ⅲ)配合物［Cr2(CA)(ph-phen)4］(SO4)2 (1),［Cr2(CA)(en)4］(SO4)2 (2) 和［Cr2(CA)(pn)4］(SO4)2 (3)；其中,CA代表氯冉酸根二价阴离子; ph-phen,en和 pn分别代表5-苯基-1,10-邻菲罗啉,乙二胺和1,3-丙二胺. 经元素分析、摩尔电导和室温磁矩的测量，以及红外光谱和紫外光谱等方法，已推定这些配合物具有氯冉酸根双核铬(Ⅲ)结构,其中每个铬(Ⅲ)离子处于八面体环境. 测定了配合物(1)的变温磁化率(77～300 K),其数据与自旋哈密顿算符H^=-2JS^1*S^2导出的磁方程拟合，求得交换积分J=-3.15 cm-1. 表明配合物中2个铬(Ⅲ)离子之间存在弱的反铁磁性自旋交换作用.%Three new chloranilato_bridged chromium (Ⅲ)_chromium (Ⅲ) binuclear complexes of the formula ［Cr2(CA)(phphen)4］(SO4)2 ［L denotes 5-phenylo1,10 phenanthroline (ph-phen); ethylenediamine (en) ; 1, 3 diaminopropane (pn) , respectively, where CA represents the dianion of chloranilic acid, have been synthesized and characterized by elemental analysis, molar conductivity and magnetic moment of room-temperature measurements, IR and electronic spectra studies. The complex ［Cr2(CA)(ph-phen)4］(SO4)2 (1) was further characterized by variable temperature (77～300 K) magnetic susceptibility measurements, which gives the exchange parameter J=-3.15 cm-1 and indicates that there is a weak anti_ferromagnetic spin_exchange interaction beween the two chromium (Ⅲ) ions within themolecule.