Heme-Fe^III Superoxide, Peroxide and Hydroperoxide Thermodynamic Relationships: Fe^III-O₂^•- Complex H-Atom Abstraction Reactivity.

ABSTRACT: Establishing redox and thermodynamic relationships between metal-ion-bound O₂ and its reduced (and protonated) derivatives is critically important for a full understanding of (bio)chemical processes involving dioxygen processing. Here, a ferric heme peroxide complex, [(F₈)Fe^III-(O₂^2-)]^- (P) (F₈ = tetrakis(2,6-difluorophenyl)porphyrinate), and a superoxide complex, [(F₈)Fe^III-(O₂^•-)] (S), are shown to be redox interconvertible. Using Cr(η-C₆H₆)₂, an equilibrium state where S and P are present is established in tetrahydrofuran (THF) at -80 °C, allowing determination of the reduction po

SUBMITTER: Kim H 

PROVIDER: S-EPMC7034651 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature