78957-08-1Relevant articles and documents
Ionized ethylidene ketene and its homologue methylene ketene
Terlouw, Johan K.,Holmes, John L.,Lossing, F. P.
, p. 1722 - 1724 (2007/10/02)
The gas phase pyrolyses of crotonic and acrylic-trifluoroacetic anhydrides were shown to yield ethylidene ketene and methylene ketene , 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.