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A 19F NMR Lewis Acidity Probe for Boranes

03 April 2025, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

In this work, a 19F NMR spectroscopic probe, p-fluorobenzonitrile (FBN), was used to evaluate the relative Lewis acidity of boranes. The resulting scale provides a trend for moderate to strong Lewis acidic boranes that are compared to Gutmann-Beckett method and theoretically calculated fluoride affinity (FA) values.

Keywords

Borane
Lewis acid
19F NMR spectroscopy
Probe

Supplementary materials

Title
Description
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Title
Supporting Information
Description
Experimental details, NMR spectra and DFT calculations.
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Version History

Apr 03, 2025 Version 1

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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
D O I: 10.26434/chemrxiv-2025-f12hc [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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