Abstract Kinetics of base hydrolysis of new heterocyclic azomethines derived from active methyl quaternary salts and aromatic nitroso compounds were investigated in the presence of 70%(wt/wt) water-methanol. The base hydrolysis of these compounds is strictly first-order with respect to OH− and azomethine. The rate determining step is suggested to be the attack of the hydroxide ion on the free base. Effects of water content and nature of organic ...