Ionized ethylidene ketene and its homologue methylene ketene
- 1 August 1983
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Chemistry
- Vol. 61 (8) , 1722-1724
- https://doi.org/10.1139/v83-294
Abstract
The gas phase pyrolyses of crotonic and acrylic-trifluoroacetic anhydrides were shown to yield ethylidene ketene [CH3CH=C=C=O] and methylene ketene [CH2=C=C=O], respectively. The former was identified via the collisional activation mass spectrum of its molecular ion. The ionization energies of the two ketenes, 8.68 and 9.12 ± 0.05 eV respectively, measured using energy selected electrons, lead to 215 and 233 kcal mol−1 for their ionic heats of formation.Keywords
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