MASS SPECTROMETRIC STUDY OF PHOTOIONIZATION .14. NITROGEN TRIFLUORIDE AND TRIFLUORAMINE OXIDE

Photoionization yield curves for the NF3+, NF2+, and NF+ ions of nitrogen trifluoride and the ONF3+, ONF2+, and NO+ ions of trifluoramine oxide were obtained from threshold to 600 Å. Ionization energies were used to calculate heats of formation of ions, ionization energies of radicals, and bond dissociation energies. The following bond dissociation energies (in eV) were derived: D(NF2-F) = 2.39, D(NF-F) = 3.4, and D(NF) = 2.4. The heat of formation, ΔHf°0(ONF3) = - 3.02 eV (-69.6 kcal mol-1), was derived from ionization threshold data and used to estimate D(O-NF3) = 4.3 eV, D(ONF2-F) = 1.9 eV, and related thermodynamic properties. © 1969, American Chemical Society. All rights reserved.