Combined experimental and theoretical study of long-range H-F interactions in α-fluoro amides.

Chem Commun (Camb)

Laboratory of Organic Chemistry, D-CHAB, ETH Zurich, Vladimir-Prelog-Weg 3, CH-8093 Zurich, Switzerland.

Published: February 2019

A combined experimental and computational approach provided insight into the nature and conformational dependence of long-range 4JHF couplings in α-fluoro amides. The dependence of 4JHF on substituents and the solvent was investigated. H-F coupling constants determined by NMR spectroscopy are in agreement with DFT calculations. NBO analysis revealed that a favourable nF→σNH* interaction correlates with the magnitude of 4JHF.

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Source
http://dx.doi.org/10.1039/c8cc09987aDOI Listing

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