Redox Cycling at Tellurium: Selective and Multiple Activation of Si―H Bonds in Common Organosilanes and SiH4

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F25%3A39923266" target="_blank" >RIV/00216275:25310/25:39923266 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1002/chem.202502141" target="_blank" >https://doi.org/10.1002/chem.202502141</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/chem.202502141" target="_blank" >10.1002/chem.202502141</a>

Result language
angličtina
Original language name
Redox Cycling at Tellurium: Selective and Multiple Activation of Si―H Bonds in Common Organosilanes and SiH4
Original language description
Redox catalysis involving the tellurenyl triflate [2-(tBuNCH)C 6 H 4 Te][OTf ] was utilized for the activation of the common silanes Et3SiH, Ph 4–nSiHn (n = 1–3) as well as the difficult-to-handle gaseous SiH4 . Furthermore, complex siloxanes containing multiple Si─H bonds were converted into siloxylatedphenols, which are of high interest for the chemical industry. Insights into the catalytic cycle utilizing para-quinones asboth oxidants and substrates were provided by identification of key intermediates and by using in situ time-resolved FTIR spectroscopy, NMR spectroscopy, single-crystal X-ray diffraction analysis, and DFT calculations. Based on this study, the catalytic cycle is initiated by a Si─H bond activation resulting in the formation of a ditelluride species and the corresponding silyl triflate. In turn, the ditelluride species is first oxidized by the presented quinone, forming an unprecedented tellurium-based oxonium intermediate, resulting in the formation of the siloxylated phenols and liberation of the tellurium catalyst upon subsequent reaction with the silyl triflate. Our proposed catalytic cycle can be generalized for any silane used in this study.
Czech name
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Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10402 - Inorganic and nuclear chemistry

Project
<a href="/en/project/GA22-17230S" target="_blank" >GA22-17230S: Organotellurium cations for activation of E-H bonds in boranes, silanes and phosphines.</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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