Effect of peripheral modification of manganese(III) porphyrazine on its reactivity in the coordination of imidazole

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Coordination of imidazole to manganese(III) porphyrazine and phthalocyanine modified by multiple peripheral substitution by trifluoromethylphenyl, trifluoromethylphenoxy, tert -butylphenyl, and 3,5-di tert -butylphenoxy groups was studied by spectrophotometric titration, and UV, visible, and IR spectroscopy. Manganese(III) complexes were found to react with imidazole with formation of 1: 1 complexes in one-step reversible process. Specificity of the effect of multiple substitution of the macroring on quantitative parameters of reactions with the organic base is related to structural features of the organic complexes.