波谱学杂志 ›› 1987, Vol. 4 ›› Issue (1): 13-19.

• 研究论文 • 上一篇    下一篇

钼铁硫原子簇化合物的合成与结构化学Ⅲ*以Fe(SR)6为桥的双立方烷化合物的磁学研究

刘汉钦, 吴达旭, 康北笙   

  1. 中国科学院福建物质结构研究所
  • 收稿日期:1986-06-16 修回日期:1986-09-02 出版日期:1987-03-05 发布日期:2018-01-22

SYNTHESIS AND STRUCTURAL STUDIES OF Mo-Fe-S CLUTER COMPOUNDS Ⅲ* MAGNETIC CHARACTERIZATION OF DOUBLE ‘CUBANE’ CLUSTER COMPLEXES WITH Fe(SR)6 BRIDGE

Liu Hanqin, Wu Daxu, Kang Beiskeng   

  1. Fujian Institute of Research on the Structure of Matter Academia Sinca, Fuzhou, Fujian
  • Received:1986-06-16 Revised:1986-09-02 Online:1987-03-05 Published:2018-01-22

摘要: 以Fe(SR)6为桥的系列钼铁硫双立方烷化合物(Et4N)4[(MoFe3S4(SR)3)2Fe(SR)6],R=ph,o-tol,m-tol和p-tol的磁极矩和1H-NMR数据作了报导和分析,并与类似的化合物作比较,讨论了它们的电子结构和磁结构。在类立方烷单元[MoFe3S4]中未配对电子有明显的离域性,过渡金属原子之间有很强的反铁磁偶合作用。整个分子形成三个基本上相互独立的磁性中心。

关键词: 原子簇化合物, 核磁共振波谱, 磁学性质

Abstract: A series of double ‘cubane’ clusters (Et4N)4[(MoFe3S4(SR)3)2Fe(SR)6], R=Ph、o-tol、m-tol、and p-tol, were studied with magnetic susceptibility and 1H NMR. Their magnetic and electronic structures were discussed. Isotropic shifts of both bridging and terminal ligands are mainly from contact interaction. Within a ‘cubane’ unit [MoFe3S4],the unpaired electrons are delocalized with strong antiferromagnetic coupling among the paramagnetic metal atoms. Two ‘cu-banes’ and a Fe(SR)6 bridge, form three practically uncorrelated magnetic centers.