...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Preparation and properties of [NH_2Et_2][Mn_10(QH)-3(phth)_9(bpy)_6],a new decanuclear Mn(II)compound with a variety of phthalate binding modes
【24h】

Preparation and properties of [NH_2Et_2][Mn_10(QH)-3(phth)_9(bpy)_6],a new decanuclear Mn(II)compound with a variety of phthalate binding modes

机译:新型邻苯二甲酸酯结合方式的新型癸核锰(II)化合物[NH_2Et_2] [Mn_10(QH)-3(phth)_9(bpy)_6]的制备与性能

获取原文
获取原文并翻译 | 示例
           

摘要

The synthesis and characterisation are reported of the new decanuclear manganese compound [NH_2Et_2][Mn_10)(OH)_3-(phth)_9(bpy)_6](2;phthH_2 = phthalic acid,bpy = 2,2'-bipyridine).obtained from the reaction of phthH_2,bpy and NEt_3 with either [Mn_12O_12(O_2CMe)_16(H_2O)_4](1)or manganese(II)acetate;the latter is by far the superior method.Complex 2 is the highest nuclearity Mnn cluster yet prepared,and it crystallizes in the triclinic space group P1.The structure of the anion consists of a pinwheel-like arrangement of ten Mn~II ions bridged by three mu_3-OH~- ions and nine bridging phtH_2 groups.Six chelating bpy groups complete octahedral coordination at each Mn~II ion.There are three different bridging modes for the phth~(2-)groups,some of them unprecedented.Solid-state,variable-temperature dc and ac magnetic susceptibility measurements reveal weak,antiferromagnetic exchange interactions between the Mn~II ions resulting in a low-spin ground state of S approx= 2 and low-lying excited states.The non-zero ground state is rationalized as due to the presence of competing exchange interactions(spin frustration)within the Mn_10 topology.
机译:报道了新的脱核锰化合物[NH_2Et_2] [Mn_10)(OH)_3-(phth)_9(bpy)_6](2; phthH_2 =邻苯二甲酸,bpy = 2,2'-联吡啶)的合成与表征。由phthH_2,bpy和NEt_3与[Mn_12O_12(O_2CMe)_16(H_2O)_4](1)或乙酸锰(II)的反应制得;后者是迄今为止最好的方法。络合物2是核度最高的Mnn簇阴离子的结构由十个Mn〜II的风车状排列,三个mu_3-OH〜-离子和九个桥接的phtH_2基组成,呈风车状排列。六个bpy螯合的螯合基团。各个Mn〜II离子具有完全的八面体配位作用。phth〜(2-)基团存在三种不同的桥联模式,其中一些是前所未有的。固态,可变温度dc和ac磁化率测量显示弱的,反磁的交换相互作用Mn〜II离子之间的关系,导致低自旋基态S约= 2和低激发态非零基态被合理化是由于Mn_10拓扑中存在竞争性交换交互作用(自旋失意)。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号