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氯桥联双核Mn(Ⅱ)配合物的合成、结构与磁性

Synthesis,Crystal Structure and Magnetic Properties of Chloro-bridged Binuclear Mn (Ⅱ)Complex
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摘要 合成了一个氯离子桥联的双核锰(Ⅱ)配合物[Mn_2(phen)_4(μ-Cl)_2][Fe(bpdmb)(CN)_2]_2·3H_2O(1) (bpdmb^(2-)=1,2-bis(pyridine-2-carboxamido)-4,5-dimethylbenzenate),表征了其结构和磁性.晶体结构解析结果表明该配合物包含双Cl^--桥联的双核锰(Ⅱ)阳离子和两个一价[Fe(bpdmb)(CN)_2]^-电荷平衡阴离子.配合物呈反铁磁性,说明通过Cl^-桥锰-锰离子间存在反铁磁相互作用.基于哈密顿算符■=-2J■_(Mn1)■_(Mn2)推导出的磁化率公式与实验数据进行拟和得到磁耦合参数J=-0.593(9)cm^(-1). A chloro-bridged dinuclear Mn （Ⅱ） complex [Mn2 （phen）4 （μ-Cl）2][Fe （bpdmb） （CN）2]2·3H2O（Ⅱ） （bpdmb^2-= 1,2-his （pyridine-2-carboxamido）-4,5-dimethylbenzenate） has been synthesized and characterized structurally and magnetically. Structural determination shows that the complex contains a doubly Cl^- bridged dinuclear Mn（Ⅱ） cation [-Mn2（phen）4 （μ-Cl）2]^2＋ and two [Fe（bpdmb）（CN）2]^- anions. Complex 1 exhibits antiferromagnetic properties, suggesting that the Cl^- bridges transmit antiferromagnetic coupling. On the basis of the Hamiltonian H=-2JSMn1SMn2 , the magnetic susceptibilities of complex 1 were fitted giving the magnetic coupling constant of J=-0. 593（9） cm^-1.
作者 张丽芳 倪中海 魏贤勇 崔爱莉 寇会忠
机构地区 清华大学化学系 中国矿业大学化工学院
出处 《南开大学学报（自然科学版）》 CAS CSCD 北大核心 2009年第2期23-28,共6页 Acta Scientiarum Naturalium Universitatis Nankaiensis
基金 国家自然科学基金(50873053)
关键词 双核配合物 晶体结构 磁性 锰 dinuclear compounds crystal structure magnetic properties manganese
分类号 O614 [理学—无机化学]
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参考文献19

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南开大学学报（自然科学版）
2009年 第2期

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