Nuclear magnetic resonance studies of the difluoride ion. Part 4.—19F and 1H high-resolution spectra of “amine.n HF” complexes

Abstract

The ¹H and ¹⁹F high-resolution magnetic resonance spectra of solutions of amine adducts of the form “amine. n HF”, with n= 1, 1.5, 2 and amine = NEt₃, NBuⁿ₂H, NBuⁿ₃, C₆H₅NH₂, and p-MeC₆H₄NH₂ have been studied both at room temperature and –80°C. Spectra from both F^– and HF^–₂ ions have been detected, the parameters for the latter showing only small differences from those previously observed in solutions of [Buⁿ₄N]⁺HF^–₂. It seems probable that the difluoride ion is little distorted from a centred configuration in all such solutions.