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Updated: Jan 17, 2026
10:39
Heterogeneous Removal of Water-Soluble Ruthenium Olefin Metathesis Catalyst from Aqueous Media Via Host-Guest Interaction
Published on: August 23, 2018
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Ruthenium-Promoted Acceptor-less Dehydrogenation of a Germane
Aidan F Carr-Davis1, Aswin Chandran1,2, Theo F N Tanner1
1Department of Chemistry, University of York, Heslington, York, North Yorkshire, YO10 5DD, UK.
Chemistry (Weinheim an Der Bergstrasse, Germany)
|September 20, 2025
Summary
Researchers developed a new method for activating germanium-hydrogen bonds using ruthenium complexes. This approach, involving spontaneous dihydrogen elimination, offers a novel pathway for functionalizing organogermanium compounds.
Area of Science:
- Organometallic Chemistry
- Catalysis
- Materials Science
Background:
- Transition metal-mediated activation of element-hydrogen bonds is crucial for synthesizing chemicals and materials.
- Established methods for germanium-hydrogen (Ge─H) bond cleavage include deprotonation and oxidative addition.
Purpose of the Study:
- To report a facile and mechanistically divergent route for activating Ge─H bonds.
- To introduce novel ruthenium complexes as effective sources of a 16-electron ruthenium fragment.
Main Methods:
- Synthesis of novel ruthenium complexes: [Ru(η⁵-C₅H₅)(OTf)(PPh₃)₂] and [{Ru(η⁵-C₅H₅)(dppe)}₂ (μ-N₂)]OTf₂.
- Reaction of these complexes with diphenylgermane (GeH₂Ph₂).
- Characterization of reaction products, including a triflate-stabilized metallogermylenium complex.
Main Results:
- A novel activation of Ge─H bonds via spontaneous dihydrogen (H₂) elimination was achieved.
- The ruthenium complexes efficiently generated the 16-electron [Ru(η⁵-C₅H₅)(P)₂]⁺ fragment.
- A triflate-stabilized metallogermylenium complex, [Ru(η⁵-C₅H₅)(GePh₂OTf)(P)₂], was formed.
- A σ-germane intermediate was observed with the dppe complex, undergoing H₂ elimination, indicating double Ge─H bond activation.
Conclusions:
- This study presents a mechanistic divergence from established Ge─H bond cleavage methods.
- The developed route provides new pathways for the functionalization of organogermanium compounds.
- Sterically demanding half-sandwich ruthenium complexes promote double Ge─H bond activation through H₂ elimination.
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