Amplifying Lewis acidity by oxidation: leveraging the redox-activity of bis(3,6-di-tert-butyl-catecholato)silane
Bis(catecholato)silanes were showcased as strong Lewis acids, while their inherent redox activity remained unexplored in this context. In the present work, we study the oxidation of monomeric bis(3,6-di-tert-butyl-catecholato)silane (1), leading to the Lewis superacidic radicalic silylium ionradical...
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| Hauptverfasser: | , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
07 January 2025
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| In: |
Dalton transactions
Year: 2025, Jahrgang: 54, Heft: 1, Pages: 65-69 |
| ISSN: | 1477-9234 |
| DOI: | 10.1039/D4DT03176H |
| Online-Zugang: | Verlag, kostenfrei, Volltext: https://doi.org/10.1039/D4DT03176H Verlag, kostenfrei, Volltext: https://pubs.rsc.org/en/content/articlelanding/2025/dt/d4dt03176h 
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| Verfasserangaben: | Thaddäus Thorwart, Manuel Schmitt and Lutz Greb |
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| 520 | |a Bis(catecholato)silanes were showcased as strong Lewis acids, while their inherent redox activity remained unexplored in this context. In the present work, we study the oxidation of monomeric bis(3,6-di-tert-butyl-catecholato)silane (1), leading to the Lewis superacidic radicalic silylium ionradical 1˙+ (FIA 784 kJ mol−1). Oxidation of 1 with [N(p-C6H4Br)3][B(C6F5)4] yielded [1][B(C6F5)4], displaying strong catalytic activity in the Friedel-Crafts-dimerization, hydrodeoxygenation and carbonyl-olefin-metathesis. It demonstrates how Lewis acidity can be amplified through oxidation without needing an add-on redox-active substituent. Instead, it synergizes the constraining effect of catecholates with their inherent redox non-innocence to unlock enhanced catalytic performance. | ||
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