- Open Access
An Unexpected and Significantly Lower Hydrogen-Bond-Donating Capacity of Fluorohydrins Compared to Nonfluorinated Alcohols†
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D.G.M. thanks Chemistry, University of Southampton for support. We thank for access to the HPC resources of [CCRT/CINES/IDRIS] under the allocation c2012085117 made by GENCI (Grand Equipement National de Calcul Intensif) and the CCIPL (Centre de Calcul Intensif des Pays de la Loire) for grants of computer time.
Abstract

Rewriting the rules as fluorination does not always increase hydrogen-bond acidity: while the strongly electron-withdrawing fluorine significantly enhances alcohol H-bond acidity in anti-vicinal fluorohydrins, an intramolecular F⋅⋅⋅HO interaction overrules completely the inductive effect. This leads to an overall decrease in alcohol H-bond acidity, compared to the corresponding nonfluorinated alcohol.