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• W1992684098 abstract "Hydrogen peroxide and the hydroperoxyl radical have been studied by photoionization mass spectrometry. The radical has been produced in situ from H2O2 by hydrogen abstraction with fluorine atoms produced in a microwave discharge. The adiabatic ionization energy of the hydroperoxyl radical has been measured as IE(HO2)=11.352±0.007 eV, while that of hydrogen peroxide has been determined to be IE(H2O2)=10.631±0.007 eV. The OH+ and HO2+ fragments from H2O2 were also measured and their threshold behavior was analyzed in terms of model functions. The 0 K appearance energy of the HO2+ fragment was determined to be AE0(HO2+/H2O2)=15.112±0.035 eV. From these values, the O–H bond dissociation energy in hydrogen peroxide of D0(H–OOH)=86.7±0.8 kcal mol−1 (87.9±0.8 kcal mol−1 at 298 K) was determined, yielding the enthalpy of formation of the hydroperoxyl radical of ΔHf 0⊖(HO2)=4.0±0.8 kcal mol−1 (3.3±0.8 kcal mol−1 at 298 K), and also implying the proton affinity of oxygen of PA(O2)=100.6±0.8 kcal mol−1 and the enthalpy of deprotonation of hydrogen peroxide of ΔHacid 298⊖(H2O2)=376.4±0.8 kcal mol−1." @default.
• W1992684098 created "2016-06-24" @default.
• W1992684098 creator A5030482320 @default.
• W1992684098 creator A5052070403 @default.
• W1992684098 date "1998-12-01" @default.
• W1992684098 modified "2023-09-23" @default.
• W1992684098 title "A photoionization study of the hydroperoxyl radical, HO2, and hydrogen peroxide, H2O2," @default.
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• W1992684098 doi "https://doi.org/10.1016/s0368-2048(98)00264-3" @default.
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