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Updated: Feb 15, 2026

Synthesis of Nine-atom Deltahedral Zintl Ions of Germanium and their Functionalization with Organic Groups
Published on: February 11, 2012
Ge12{Fe(CO)3}8(μ-I)4: a germanium-iron cluster with Ge4, Ge2 and Ge units
Silke Wolf1, Wim Klopper, Claus Feldmann
1Institute of Inorganic Chemistry, Karlsruhe Institute of Technology, Engesserstrasse 15, D-76131 Karlsruhe, Germany. claus.feldmann@kit.edu.
Abstract:
The germanium-iron cluster Ge12{Fe(CO)3}8(μ-I)4 was prepared by reacting GeI4 and Fe2(CO)9 in [BMIm]Cl/AlCl3 as ionic liquid (BMIm: 1-butyl-3-methylimidazolium). The cluster contains a Ge12Fe8 metal core consisting of a central Ge4 rectangle, two Ge2 pairs, and four single Ge atoms. These Ge units are interconnected by Fe atoms to a real Ge-Fe cluster. According to DFT calculations, Hund's localization criterion is fulfilled for the whole cluster if we assume three different atomic charges on the Ge4, Ge2, and Ge units.
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