Thermochemistry of the Gas Phase Reactions of Fluorofullerene Anions

The ion−molecule equilibrium method has been applied to studies of the gas phase fluorine exchange reactions between fullerene anions and metal fluoride anions. This has yielded the first quantitative determination of the absolute values of Gibbs energies for addition of fluorine to the anions of higher fullerenes C 70+2 n - ( n = 0, 1, ..., 7) and sequential fluorine addition in the series C 60 F n - ( n = 0, 1, 2). Estimates for C−F bond dissociation energies of C 60 F 2 and C 70 F 2 and electron affinities of monofluorinated [60]- and [70]fullerenes in the gas phase are reported.