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Boron(II) cations: Interplay between Lewis-pair-acceptor and electron-donor properties

Boron(III) cations are widely used as highly Lewis acidic reagents in synthetic chemistry. In contrast, boron(II) cations are extremely rare and their chemistry almost completely unknown. They are both Lewis acids and electron donors, properties that are commonly associated with catalytically active...

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Main Authors: Widera, Anna (Author) , Vogler, Daniel (Author) , Wadepohl, Hubert (Author) , Kaifer, Elisabeth (Author) , Himmel, Hans-Jörg (Author)
Format: Article (Journal)
Language:English
Published: 04 July 2018
In: Angewandte Chemie. International edition
Year: 2018, Volume: 57, Issue: 35, Pages: 11456-11459
ISSN:1521-3773
DOI:10.1002/anie.201806135
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/anie.201806135
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/anie.201806135
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Author Notes:Anna Widera, Daniel Vogler, Hubert Wadepohl, Elisabeth Kaifer, and Hans-Jörg Himmel
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Summary:Boron(III) cations are widely used as highly Lewis acidic reagents in synthetic chemistry. In contrast, boron(II) cations are extremely rare and their chemistry almost completely unknown. They are both Lewis acids and electron donors, properties that are commonly associated with catalytically active late-transition-metal complexes. This double reactivity pattern ensures a rich and diverse chemistry. Herein we report the facile synthesis of several new boron(II) cations starting with a special diborane with two easily exchangeable triflate substituents. By increasing the π-acceptor character of the neutral σ-donor reaction partners, first reactions were developed in which the combined Lewis acidity and electron-donor properties of boron(II) cations are applied for the reduction of organic molecules. The results of our study pave the way for applications of these unusual compounds in synthetic chemistry.
Item Description:Gesehen am 16.03.2020
Physical Description:Online Resource
ISSN:1521-3773
DOI:10.1002/anie.201806135

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