Acid and Complexing Properties of Tetraazaporphyrins

In this review, the kinetic regularities underlying the formation and stability of acid–base tetraazaporphyrin complexes with nitrogen bases in benzene (chlorobenzene) are considered. The relationships between the structure of protolytes and their reactivities are discussed. The role of the acid–base interactions in the reaction of magnesium acetate or acetylacetonate with tetrahalogen- and octaphenyl-substituted tetraazaporphyrins in the nitrogen-containing base–benzene system was revealed. The possible mechanisms of the processes under study are considered and a relatioship is established between the reaction rate constants and structural changes in a solution.