Electron impact-induced mass spectral study of new isomeric

N-substituted hydrazones of ortho-, meta- and para-hydroxybenzaldehydes

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Eur. J. Mass Spectrom. 5, 183 - 190 (1999)

Electron impact-induced mass spectral study of new isomeric N-substituted hydrazones of ortho-, meta- and para-hydroxybenzaldehydes

E. Wyrzykiewicz and D. Prukala
Department of Mass Spectrometry of Organic Coumpounds, Faculty of Chemistry, Adam Mickiewicz University, Grunwaldzka 6, 60 -780 Poznan, Poland.

ABSTRACT:

Electron impact-induced mass spectral fragmentations of eighteen new hydrazones of o-, m- and p-hydroxybenzaldehydes and hydrazides of (E)-stilbenyloxyalkanocarboxylic acids, as well as N-(E)-stilbenyloxyalkylcarbonyl substituted amino acids, were investigated. Fragmentation pathways are proposed on the basis of accurate mass measurements and spectra from linked scans at constant B/E. The correlation between the intensities of M^+· and selected fragment ions of these compounds is discussed. The data obtained create a basis for distinguishing isomers.

Keywords: o-, m- and p-hydroxybenzaldehydes, amino acids, hydrazones, EIMS, stilbene, structural isomers

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