The solution thermochemistry of antimony pentafluoride and some fluoroantimonates

Abstract

From hydrolysis and solution measurements the enthalpies of formation of SbF 5(ℓ), LiSbF 6(s), NaSbF 6(s), KSbF 6(s), CsSbF 6(s), AgSbF 6(s), and SbF 6 −aq. are estimated to be −1324 ± 12, −2062 ± 5, −2060 ± 6, −2080 ± 3, −2082 ± 15, −1653 ± 3, and −1789 ± 4 kJ mol −1 respectively. Less precise estimates of the enthalpies of formation of O 2SbF 6 and of CsSb 3F 16 are also given. From the results the fluoride ion affinity of SbF 5, the single ion hydration enthalpy of SbF 6 − (g), and the charge distribution within the SbF 6 − ion have been calculated.