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Polarographie Studies of Some Hydroxy Aromatic Schiff-Bases in Solutions of Varying pH

The Polarographie reduction of some aromatic schiff bases is studied in aqueous solutions of varying pH. The electrode reaction is discussed in relation to molecular structure. The dissociation constants of the intermediate protonated species and the reversible half-wave potentials are determined. The electrode reaction is irreversible, it is controlled by diffusion and the rate of electron transfer.