Spectroscopic studies of some Schiff bases derived from ethylene-diamines and phenylenediamines

The electronic absorption spectra of 14 Schiff base compounds derived from ethylenediamines and phenylendiamines were investigated in organic solvents of varying polarities. The acid dissociation constants of the compounds are determined by potentiometric technique. The important bands in the IR spectra and the main 1HNMR signals are assigned and discussed in relation to molecular structure