A Photoionization study of some benzoyl compounds—Thermochemistry of [C7H5O]+ formation
- 1 August 1979
- journal article
- research article
- Published by Wiley in Journal of Mass Spectrometry
- Vol. 14 (8) , 434-438
- https://doi.org/10.1002/oms.1210140808
Abstract
Appearance energies for [C7H5O]+ fragment ions, formed from a variety of benzoyl compounds, have been measured by photon impact. The mean heat of formation calculated for [C7H5O]+ is 705 ± 6 kJ mol−1, which can be correlated with either a single threshold structure or a mixture of structures with similar heats of formation. Previously observed variations of ΔHf([C7H5O]+) with precursor molecule are shown to be consistent with a structure dependent kinetic shift, rather than the presence of isolated electronic states.Keywords
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