Photoionization mass spectrometric study of KrF2

Abstract

From a study of the process KrF₂+hν→ Kr⁺+ F ^–+ F, a value for ΔH⁰_f0(KrF₂) of + 15.5₂ kcal mol^–1 has been derived. This implies an average Kr—F bond energy of 0.46 eV. The appearance potential of KrF⁺ from KrF₂(⩽13.39 eV) has provided a means for D₀(KrF⁺) 1.53 eV to be deduced. A crude correlation with a recent photoelectron spectroscopic study has been noted. The first ionization potential of KrF₂ may be slightly lower than 13.39 eV, but the intensity of KrF⁺₂ was too weak to establish this value.