The renaissance of homoatomic nine-atom polyhedra of the heavier carbon-group elements Si-Pb

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Abstract

Homoatomic nine-atom clusters of the elements Si, Ge, Sn, and Pb represent a fascinating class of molecules. The Zintl anions [E9]x- occur with different charges x and various shapes. Mixed valent compounds and polymeric chains via cluster linkage promise outstanding physical and chemical properties. A summary of recent progress in synthesis, crystal structure, EXAFS investigations, chemical bonding, Raman spectroscopy, mass spectrometry, and chemical reactivity is given. The shapes of about 30 Zintl ions [E9] are analysed. Finally, it is shown that a close relationship exists between the compounds with anionic nine-atom clusters of elements of the carbon group and the superconducting fulleride salts, which contain negatively charged polyhedra of the lightest element in this group.

Original languageEnglish
Pages (from-to)347-377
Number of pages31
JournalCoordination Chemistry Reviews
Volume215
Issue number1
DOIs
StatePublished - 2001
Externally publishedYes

Keywords

  • EXAFS
  • Group 14 elements
  • Magnetic properties
  • Mass spectrometry
  • Nine-atom clusters
  • Zintl ion

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