Thermochemical quantities for gas-phase iron, uranium, and molybdenum fluorides, and their negative ions

Article abstract of DOI:10.1016/0021-9614(88)90080-8

Ion-to-molecule equilibria among gaseous iron, uranium, and molybdenum fluorides, and their negative ions, have been studied by Knudsen-cell mass spectrometry with the help of a combined ion source.On the basis of thermochemical quantities, derived by third-law analysis and from the literature for enthalpies of formation of gaseous species, electron affinities have been calculated for a number of molecules: FeF3, (349 +/- 13) kJ*mol^-1; UF5, (361 +/- 21) kJ*mol^-1; UF6, (488 +/- 19) kJ*mol^-1; MoF5, (335 +/- 17) kJ*mol^-1; MoF6, (369 +/- 18) kJ*mol^-1; Mo2F9, (350 +/- 40) kJ*mol^-1; and Mo2F10, (363 +/- 25) kJ*mol^-1.