Oxidative coupling of silylated nonagermanide clusters.
Christoph Wallach1, Wilhelm Klein1, Thomas F Fässler1
1Department Chemie, Technische Universität München, Lichtenbergstraße 4, 85747 Garching, Germany. thomas.faessler@lrz.tum.de.
Chemical Communications (Cambridge, England)
|April 13, 2022
Summary
Researchers coupled two germanium clusters, forming a novel dimeric structure. This breakthrough enables precise control over atom-precise nano-structures using main group elements.
Area of Science:
- Inorganic Chemistry
- Materials Science
- Nanotechnology
Background:
- Polyhedral clusters of tetrel main group elements are promising building blocks for atom-precise nanostructures.
- The synthesis and reactivity of germanium clusters are key areas in main group chemistry.
Purpose of the Study:
- To report the oxidative coupling of two [Ge9{Si(TMS)3}2]2- clusters.
- To characterize the resulting dimeric cluster and understand the coupling mechanism.
Main Methods:
- Oxidative coupling reaction of [Ge9{Si(TMS)3}2]2- clusters in the presence of Cy2BCl.
- Structural characterization of the dimeric product as an [NHCiPr]Cu+ adduct using X-ray crystallography.
- Identification of a boron-oxygen by-product indicating oxygen mediation.
Main Results:
- Successful synthesis of the dimeric cluster [Ge9{Si(TMS)3}2]2- via oxidative coupling.
- Structural elucidation of the dimer as {NHCiPrCu[Ge9{Si(TMS)3}2]}2, featuring an exo Ge-Ge bond.
- Evidence for oxygen mediation in the coupling reaction, supported by the isolation of Cy2B-O-BCy2.
Conclusions:
- The oxidative coupling of [Ge9{Si(TMS)3}2]2- clusters provides a route to novel dimeric germanium nanostructures.
- The formation of the Ge-Ge bond is facilitated by specific reaction conditions and potentially mediated by trace oxygen.
- This work expands the possibilities for constructing complex atom-precise nanomaterials from molecular precursors.
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