Abstract
Reactions of octa(bromophenyl)tetraazaporphyrin (H2OBPTAP) and octaphenyltetraazaporphyrin with Mn(II) acetate and chloride in DMF and pyridine are studied by spectrophotometric method. In the course of formation of octaphenyltetraazaporphyrin complexes, pyridine stabilizes an oxidation state of Mn (+2), and in addition to Mn(II) complex, its radical form is likely to be obtained also in this case. In DMF, the octaphenyltetraazaporphyrinatomanganese(III) complexes are produced. Kinetic studies showed that the complexing capability of Mn acetate in reaction with azaporphyrins drastically differs from that of Mn chloride. H2OBPTAP does not react with MnCl2 in pyridine, while its reaction with Mn(OAc)2 has k 298eff = (3.1 ±0.2) × 10-3 s-1. Reaction of H2OBPTAP with Mn(OAc)2 in DMF occurs instantaneously, whereas in the case of its reaction with MnCl2, k 298eff = (1.9 ±0.2) ×10-3 s-1.
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Translated from Koordinatsionnaya Khimiya, Vol. 31, No. 1, 2005, pp. 22–27. Original Russian Text Copyright © 2005 by Klyueva, Repina, Chizhova, Berezin.
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Klyueva, M.E., Repina, N.V., Chizhova, N.V. et al. Complexation of octa(bromophenyl)tetraazaporphyrin with Mn(II) salts in DMF and pyridine. Russ J Coord Chem 31, 19–24 (2005). https://doi.org/10.1007/PL00022080
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DOI: https://doi.org/10.1007/PL00022080