Nitrite Catalyzes Reductive Nitrosylation of the Water-Soluble Ferri-Heme Model FeIII(TPPS) to FeII(TPPS)(NO)

BO Fernandez, IM Lorković, PC Ford - Inorganic chemistry, 2003 - ACS Publications
BO Fernandez, IM Lorković, PC Ford
Inorganic chemistry, 2003ACS Publications
Quantitative investigation of the reaction of the ferri-heme model compound FeIII
(TPPS)(H2O) 2 (1) to give FeII (TPPS)(NO)(2)(TPPS= tetra (4-sulfonato-phenyl) porphinato)
in buffered aqueous solution demonstrates a slow pH-independent reductive nitrosylation
pathway in the pH range 4− 6. The rate of this reaction is subject to modest general base
catalysis. In the course of this study, a surprising catalytic pathway whereby nitrite ion (NO2-)
strongly catalyzes the reduction of 1 to 2 under reductive nitrosylation conditions was …
Quantitative investigation of the reaction of the ferri-heme model compound FeIII(TPPS)(H2O)2 (1) to give FeII(TPPS)(NO) (2) (TPPS = tetra(4-sulfonato-phenyl)porphinato) in buffered aqueous solution demonstrates a slow pH-independent reductive nitrosylation pathway in the pH range 4−6. The rate of this reaction is subject to modest general base catalysis. In the course of this study, a surprising catalytic pathway whereby nitrite ion (NO2-) strongly catalyzes the reduction of 1 to 2 under reductive nitrosylation conditions was demonstrated.
ACS Publications