Heat of formation for the propanoyl cation by photoionization mass spectrometry
- 1 March 1985
- journal article
- research article
- Published by Wiley in Journal of Mass Spectrometry
- Vol. 20 (3) , 223-227
- https://doi.org/10.1002/oms.1210200311
Abstract
The ionization energies and [C3H5O]+ appearance energies for a series of oxygenated organic compounds have been measured by dissociative photoionization mass spectrometry. The adiabatic ionization energy for cyclopentanol is observed to be 9.72 eV. A 298 K heat of formation of 591.2±2.3kJ mol−1, based on the stationary electron convention, is derived for the propanoyl cation in the gas phase. A heat of formation of –86±6 kJ mol−1 is obtained for methylketene, which leads to an absolute proton affinity of 853±8 kJ mol−1.Keywords
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