Letter: Ionized 1,4-dioxane; the structures of the m/z 44 and m/z 45 fragment ions revisited

Eur. J. Mass Spectrom. 4, 79–81 (1998)
DOI: 10.1255/ejms.193

Letter: Ionized 1,4-dioxane; the structures of the m/z 44 and m/z 45 fragment ions revisited

R. Thissen, P. Mourgues and H.E. Audier
Laboratoire des Mécanismes Reactionnels, UMR CNRS 7651, Ecole Polytechnique, F-91128, Palaiseau, France.

ABSTRACT:

The structures of m/z 44 and m/z 45 fragment ions from ionized 1,4-dioxane were reinvestigated by means of ion–molecule reactions and appearance energy (AE) measurements. They are found to be ionized vinyl alcohol (m/z 44) and protonated acetaldehyde (m/z 45), respectively. The same AE value is found for both ions, suggesting a common intermediate.

Keywords: 1,4-dioxane, ion structure, bimolecular reactivity, deuterium labeling, appearance energy.

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