摘要
在混合桥基的双核体系中,金属中心的磁轨道的线形组合可与相同对称性的桥基最高占据轨道(HOMO'S)相互作用.如果两种桥联配体稳定同一磁轨道组合,则称它们以互补方式起作用;反铁磁偶合就会被加强.反之,如果桥联配体稳定不同的磁轨道组合,则称它们以反互补方式起作用;这将减小反铁磁偶合.本文就互补和反互补效应以及相关的磁学知识做一简要概述.
In the dinuclear complexes with two dissimilar bridges, the highest occupied molecular orbitals (HOMO′S) of the bridging ligands interact with the magnetic orbitals of the metal ions according to the matching of symmetries. If the bridging ligands work to stabilize the same combination of magnetic orbitals, then the former are said to operate in a complementary fashion, and the antiferromagnetic exchange interaction is enhanced. Conversely, bridging ligands that attempt to stabilize different combinations of magnetic orbitals are said to operate in a countercomplementary fashion, which tends to attenuate antiferromagnetic exchange interactions. In this paper, orbital complementary and countercomplementary effects and related magnetic knowledge are briefly reviewed.
出处
《化学研究》
CAS
2003年第2期74-80,共7页
Chemical Research
基金
国家自然科学基金资助项目(20071019
50172021)
国家自然科学重点基金资助项目(90101028).
关键词
混合桥基
双核配合物
轨道互补
反互补效应
磁轨道
桥联配体
超交换作用
反铁磁偶舍
magnetic orbital
bridging ligand
superexchange interaction
antiferromagnetic coupling
complementary and countercomplementary effects
