โ Scribed by John C. Traeger; Barbara M. Kompe
No coin nor oath required. For personal study only.
The adiabatic ionization energies and COOH' appearance energies for a series of carboxylic acids have been measured by dissociative photoionization mass spectrometry. Using the stationary electron convention, a heat of formation of 143.5 f 0.7 kcal mol-' (1 kcal = 4.184 kJ) at 298 K is derived for the carboxyl cation in the gas phase, which corresponds to an absolute proton afiinity for carbon dioxide of 128.1 f 0.7 kcal mol-I.
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