Catalytic Degradation of Aliphatic Ethers using the Lewis Superacidic Bis(perfluoropinacolato)silane

Article Chemistry, Multidisciplinary

Dihydrogen Activation with a Neutral, Intermolecular Silicon(IV)-Amine Frustrated Lewis Pair

Thaddaeus Thorwart et al.

Summary: In this study, a novel Lewis acid was reported and successfully applied in dihydrogen activation, which has been elusive for non-planar Lewis acid. This research result is important for understanding the mechanism of FLP reactions.

CHEMISTRY-A EUROPEAN JOURNAL (2022)

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Article Chemistry, Multidisciplinary

Silicon Catalyzed C-O Bond Ring Closing Metathesis of Polyethers

Nils Ansmann et al.

Summary: The Lewis superacid bis(perchlorocatecholato)silane catalyzes C-O bond metathesis of alkyl ethers with high efficiency, enabling chemoselective ring contractions of macrocyclic crown ethers and unprecedented ring-closing metathesis of polyethylene glycols for polymer-selective degradation.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2022)

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Article Chemistry, Multidisciplinary

Bis(perfluoropinacolato)silane: A Neutral Silane Lewis Superacid Activates Si-F Bonds

Florian S. Tschernuth et al.

Summary: This study introduces a Lewis superacid based on perfluorinated pinacol substituents, demonstrating its superacidic nature through experiments and showcasing its potential in catalytic properties.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

The Structure of Bis(catecholato)silanes: Phase Adaptation by Dynamic Covalent Chemistry of the Si-O Bond

Deborah Hartmann et al.

Summary: This study comprehensively investigates the structure of tetracoordinate bis(catecholato) silane through various experimental techniques. The compound shows unprecedented phase adaptation and reveals dynamic covalent features of the most abundant chemical bond in Earth's crust.

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY (2021)

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Article Chemistry, Multidisciplinary

Silicon Tetrakis(trifluoromethanesulfonate): A Simple Neutral Silane Acting as a Soft and Hard Lewis Superacid

Andre Hermannsdorfer et al.

Summary: Si(OTf)(4) is a neutral silicon-based Lewis superacid suitable for reactions with both soft and hard Lewis bases. Its OTf groups have a dual function, forming complexes with soft Lewis donors and cleaving C-X bonds of hard organic Lewis bases to form SiX4 products.

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION (2021)

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Article Chemistry, Multidisciplinary

Bis(pertrifluoromethylcatecholato)silane: Extreme Lewis Acidity Broadens the Catalytic Portfolio of Silicon

Thaddaeus Thorwart et al.

Summary: The article introduces a novel per(trifluoromethyl)catechol silicon complex, which exhibits strong Lewis acidity and can catalyze deoxygenations of aldehydes, ketones, and amides. This compound represents one of the strongest neutral Lewis acids accessible in the condensed phase.

CHEMISTRY-A EUROPEAN JOURNAL (2021)

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Article Chemistry, Multidisciplinary

Bis(perchlorocatecholato)silane and heteroleptic bidonors: hidden frustrated Lewis pairs resulting from ring strain

Deborah Hartmann et al.

Summary: The reaction between Bis(perchlorocatecholato)silane and bidentate N,N- or N,P-heteroleptic donors results in the formation of hexacoordinated complexes. These complexes exhibit frustrated Lewis pair (FLP) reactivity, enabling reactions with aldehydes and catalytic ammonia borane dehydrocoupling. Density functional theory was used to analyze all reactions, providing an alternative approach to achieve frustration in bimolecular FLPs beyond relying on steric bulk.

CHEMICAL COMMUNICATIONS (2021)

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Article Chemistry, Multidisciplinary