The hydrogen fluoride solvent system. Part I. Solutions of antimony pentafluoride and antimony tetrafluoride monofluorosulphate

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Abstract
The electrical conductivity and 19F and 1H n.m.r. spectra of the hydrogen fluoride–antimony pentafluoride system are accounted for in terms of the reactions 2HF + SbF5 H2F++ SbF6 –, and SbF6 –+nSbF5→[Sbn+1 F5n+1]–. It is shown that the ion H2F+ has an abnormally high mobility and therefore probably conducts by a proton-transfer mechanism. SbF4SO3F undergoes solvolysis according to the equation SbF4SO3F + 3HF → H2F++ SbF6 –+ HSO3F.