19F NMR of antimony and arsenic pentafluoride-graphite derivatives

¹⁹F NMR results are reported on first stage SbF₅-GIC and second stage AsF₅-GIC as a function of temperature. Above a “cutting temperature”, we postulate the existence of two fluorine population at least, which we have tried to identify on our spectra according to a pentafluoride oxidation reaction. The results are correlated with a charge transfer coefficient evolving with temperature, and are discussed in comparison with other experimental results.