...
首页> 外文期刊>Dalton transactions: An international journal of inorganic chemistry >Magneto-structural correlations in dirhenium(IV) complexes possessing magnetic pathways with even or odd numbers of atoms
【24h】

Magneto-structural correlations in dirhenium(IV) complexes possessing magnetic pathways with even or odd numbers of atoms

机译:具有甚至或奇数原子的菱形(IV)配合物中的磁结构相关性

获取原文
获取原文并翻译 | 示例
           

摘要

The employment of pyrazine (pyz), pyrimidine (pym) and s-triazine (triz) ligands in Re-IV chemistry leads to the isolation of a family of complexes of general formula (NBu4)(2)[(ReX5)(2)(mu-L)] (L = pyz, X = Cl (1) or Br (2); L = pym, X = Br (3); L = triz, X = Br (4)). 1-4 are dinuclear compounds where two pentahalorhenium(IV) fragments are connected by bidentate pyz, pym and triz ligands. Variable-temperature magnetic measurements, in combination with detailed theoretical studies, uncover the underlying magneto-structural correlation whereby the nature of the exchange between the metal ions is dictated by the number of intervening atoms. That is, the spin-polarization mechanism present dictates that odd and even numbers of atoms favour ferromagnetic (F) and antiferromagnetic (AF) exchange interactions, respectively. Hence, while the pyz ligand in 1 and 2 mediates AF coupling, the pym and triz ligands in 3 and 4 promote F interactions.
机译:Re-IV化学中的吡嗪(PIZ),嘧啶(Pym)和S-三嗪(Triz)配体的就业导致通式(NBU4)(2)(REX5)(2)的复合物系列分离 (mu-l)](l = pyz,x = cl(1)或br(2); l = pym,x = br(3); l = triz,x = br(4))。 1-4是二核化合物,其中两个五才铼(IV)片段通过二齿PyZ,Pym和Triz配体连接。 可变温度磁性测量与详细的理论研究结合,揭示了潜在的磁结构相关性,从而通过中间原子的数量决定了金属离子之间的交换的性质。 也就是说,旋转偏振机构存在规定了奇数甚至数量的原子分别有利于铁磁性(F)和反铁磁(AF)交换相互作用。 因此,在1和2中的PIZ配体介导AF偶联,Pym和Triz配体在3和4中促进F相互作用。

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