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Effect of imidazole on the structure and properties of Zn-5,15-di(o-methoxyphenyl)-2,8,12,18-tetramethyl-3,7,13,17-tetrabutylporphyrin in reaction with organic peroxides

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Abstract

The reaction of Zn-5,15-di(o-methoxyphenyl)-2,8,12,18-tetramethyl-3,7,13,17-tetrabutylporphyrin with organic peroxides in the presence of imidazole was studied in order to investigate the effect of modification and deformation of the macrocycle on the redox properties of metalloporphyrins. The kinetic characteristics of the reaction were obtained. It was found that the introduction of imidazole into the reaction mixture resulted in an increase in the rate of oxidation of zincporphyrin. Quantum-chemical calculations of the reagents and intermediates of the oxidation reaction were performed at the PM3 level of theory. The deformational distortions of the free macrocycle and during the course of the reaction were estimated. The effect of the structure modification and the degree of deformation of the macrocyclic ligand on the parameters of the process [effective (k eff) and true (k v) rate constants] was found.

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Correspondence to O. R. Simonova.

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Original Russian Text © O.R. Simonova, S.V. Zaitseva, 2009, published in Zhurnal Obshchei Khimii, 2009, Vol. 79, No. 7, pp. 1180–1186.

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Simonova, O.R., Zaitseva, S.V. Effect of imidazole on the structure and properties of Zn-5,15-di(o-methoxyphenyl)-2,8,12,18-tetramethyl-3,7,13,17-tetrabutylporphyrin in reaction with organic peroxides. Russ J Gen Chem 79, 1537–1543 (2009). https://doi.org/10.1134/S1070363209070238

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  • DOI: https://doi.org/10.1134/S1070363209070238

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