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Highly active iron catalysts for olefin hydrogenation enable parahydrogen induced hyperpolarisation of 1H and 19F NMR resonances at 1.4 Tesla

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

Abstract

Parahydrogen induced polarisation (PHIP) is an excellent tool for extracting mechanistic information in catalysis since it circumvents the intrinsic low sensitivity of nuclear magnetic resonance (NMR) spectroscopy. We report a class of iron complexes, which are highly active in olefin hydrogenation catalysis and act as PHIP catalysts at 1.4 Tesla. Moreover, hyperpolarisation transfer to 19F is observed.

Keywords

hydrogenation
iron
parahydrogen-induced polarisation

Supplementary materials

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Description
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Title
Electronic Supporting Information
Description
Synthesis protocols, NMR spectra, Additional Mechanistic Discussion, Computational Data
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Version History

Jun 17, 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-w2h6z
D O I: 10.26434/chemrxiv-2025-w2h6z [opens in a new tab]

Funding

Deutsche Forschungsgemeinschaft
RO5979/2-1
Deutsche Forschungsgemeinschaft
CRC 1487, Projekt 443703006
Deutsche Forschungsgemeinschaft
INST 40/575-1 FUGG, JUSTUS 2 cluster

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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