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Müller versus Gutmann-Beckett for Assessing the Lewis Acidity of Boranes

29 April 2025, Version 2
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

A 19F NMR spectroscopic probe, p-fluorobenzonitrile, is used to evaluate the relative Lewis acidity of boranes. The resulting scale is compared with the Gutmann-Beckett method which uses triethylphosphine oxide as a 31P NMR probe and both are compared to computed fluoride affinities.

Keywords

Borane
Lewis acid
19F NMR spectroscopy
Probe

Supplementary materials

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Description
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Supporting Information
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Experimental, Spectra, and Computational Details
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Version History

Apr 29, 2025 Version 2

Version Notes

This is a revised draft. The text has been edited but none of the data has been changed.

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The content is available under CC BY NC 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv-2025-f12hc-v2
D O I: 10.26434/chemrxiv-2025-f12hc-v2 [opens in a new tab]

Funding

Welch Foundation
AA-2203-20240404
National Science Foundation
2349851

Author’s competing interest statement

The author(s) have declared they have no conflict of interest with regard to this content

Ethics

The author(s) have declared ethics committee/IRB approval is not relevant to this content

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