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Year 2007, Month 4 (Section Full Articles, Page 743)

Coordination compounds of cobalt porphyrins with nitrogen monoxide

S. G. Pukhovskaya
L. Zh. Guseva, and O. A. Golubchikov

Complex formation of NO and the NO2 – ion with cobalt porphyrins bearing various substituents in the porphyrin macrocycle, viz., tetraphenylporphine (1), β-octabromo-meso-tetraphenylporphyrin (2), protoporphyrin IX (3), and 5,10,15,20-tetra(4N-carboxymethylenepyridyl)porphyrin tetrabromide (4), was studied. The stability constants of the nitrosyl and nitrite extracomplexes in water and in ethanol were determined. Porphyrin 4 forms the most stable extracomplexes.

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