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

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.