Kinetics of the reactions of “capped” zinc 5,15-(1,4-bis(2′-phenylenoxymethylene)-phenyl)-2,8,12,18-tetramethyl-3,7,13,17-tetrabutylporphyrinate) with organic peroxides in o-xylene

Abstract

The reactions of “capped” zinc porphyrinate with organic peroxides were studied by spectrophotometry. The reaction rate constant was determined (0.417 s−1 mol−1 l−1). The variation of the imidazole concentration in the reaction mixture changed the composition of the reactants and increased the reaction rate by 1.3–5.3 times. The geometric characteristics of isolated molecules of the reactants and intermediates were obtained by the PM3 quantum-chemical method. The calculated structures of these compounds were flat and characterized by a distorted macrocycle. An increase in steric strains of the macrocycles of the molecular complex with imidazole and of the imidazole-containing reaction intermediates was shown.