EIMS study of new isomeric N-substituted hydrazones of 2-(3-and 4-)-pyridinecarboxaldehydes

Fl induced mass spectral fragmentations of twelve new hydrazones of 2-(3- a nd 4-)-pyridinecarboxaldehydes and hydrazides of (E)-stilbenyloxyacetic aci d as well as N-(E)-stilbenyloxyalkylcarbonyl substituted amino acids were i nvestigated. Fragmentations pathways are proposed on the basis of accurate mass and B/E linked scan spectra measurements. The correlation between the intensities of M+(.) and the selected fragment ions of these compounds is d iscussed. The data obtained create the basis for distinguishing isomers.