Bulletin of the Korean Chemical Society

Korean Chemical Society (대한화학회)
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Bonding of Electron Deficient Thallium-Metal Cluster Compound

  • Kang, Sung-Kwon (Department of Chemistry, College of Natural Sciences, Chungnam National University)
  • Published : 1993.04.20
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Abstract

Molecular orbital calculations at the extended Huckel level have been carried out for an electron deficient cluster, $Tl_3(FeL_3)_2{(FeL_4)_3}^{-3}$, where L=CO or $H^-$. The LUMO, $2a_2$", is destabilized by the secondary interaction of the LUMO with $1a_2$" on $(FeL_3)_2$ fragment. This is one of six skeletal bonding orbitals which are associated with $Tl-FeL_3$ bonds. Overlap population analysis has been applied to account for two kinds of Tl-Fe bonds. Replacement of the terminal $C_{3v}$, $FeL_4$, by the $C_{2v}$, $FeL_4$ units in cluster results in slight energy stabilization of the cluster.

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