Electron impact induced fragmentation of β??allenic and γ??acetylenic alcohols

…, A Maquestiau, R Flammang, P Guenot…

Index: Arseniyadis, Simeon; Maquestiau, Andre; Flammang, Robert; Guenot, Pierre; Carrie, Robert Organic Mass Spectrometry, 1989 , vol. 24, p. 909 - 916

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Abstract

Abstract The main fragmentation pathway of ionized hydroxyallenes (1) consists of a methyl loss. Extensive deuterium-labelling experiments indicate that the terminal allenic carbon is implied in this fragmentation. Collisional activation spectra indicate a propenyl-acylium structure (a) for these [M–CH 3]+ ions which can originate from a 1, 4-hydroxyl migration followed by hydrogen rearrangements. Isomeric hydroxyacetylenes (2) behave similarly, ...