Bis(perchlorocatecholato)germane: Hard and Soft Lewis Superacid with Unlimited Water Stability

Previously described Lewis superacids are moisture sensitive and predominantly hard in character—features that severely limit their widespread use in orbital-controlled reactions and under non-inert conditions. Described here are adducts of bis(perchlorocatecholato)germane, the first hard and soft L...

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Main Authors: Roth, Daniel (Author) , Wadepohl, Hubert (Author) , Greb, Lutz (Author)
Format: Article (Journal)
Language:English
Published: 2020
In: Angewandte Chemie. International edition
Year: 2020, Volume: 59, Issue: 47, Pages: 20930-20934
ISSN:1521-3773
DOI:10.1002/anie.202009736
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1002/anie.202009736
Verlag, kostenfrei, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.202009736
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Author Notes:Daniel Roth, Hubert Wadepohl, and Lutz Greb

MARC

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520 |a Previously described Lewis superacids are moisture sensitive and predominantly hard in character—features that severely limit their widespread use in orbital-controlled reactions and under non-inert conditions. Described here are adducts of bis(perchlorocatecholato)germane, the first hard and soft Lewis superacid based on germanium. Remarkably, the synthesis of this compound is performed in water, and the obtained H2O adduct constitutes a strong Brønsted acid. If applied as an adduct with aprotic donors, it displays excellent activity in a diverse set of Lewis acid catalyzed transformations, covering hydrosilylation, hydrodefluorination, transfer hydrogenation, and carbonyl-olefin metathesis. Given the very straightforward synthetic access from two commercially available precursors, the unlimited water stability and the soft Lewis acidic character, it promotes the transfer of Lewis superacidity into organic synthesis and materials science. 
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