EFFECTS OF BORIC ACID ON THE RATE AND EQUILIBRIUM OF SCHIFF BASE FORMATION FROM SALICYLALDEHYDE.

Abstract

Effects of boric acid on the formation of the Schiff base from salicylaldehyde and 2-methoxyethylamine (or glycinate) were examined in aqueous solution. From the formation constants in the absence and presence of boric acid, the equilibrium constants for the borate-Schiff base complexation were determined. The structure of the complex was deduced from the UV spectral analysis. Formation of the Schiff base was found to be accelerated by boric acid (pH 7-10). A mechanism for the reaction involving the complex is presented.