IV-spectroscopic studies of new salicoyl and benzoyl hydrazones derived from beta-diketones

ABSTRACT

The electronic absorption spectra of some new hydrazones derived from acetylacetone or benzoylacetone are investigated in organic solvents of varying polarities and buffer solutions of different pH. The behaviour in the latter is utilized in calculating the pK alpha of the phenolic and enolic OH groups in different solvents. The important bands in the IR spectra and the main [1]Hnmr signals are assigned and discussed in relation to molecular structure