73133-33-2Relevant academic research and scientific papers
Pulse Radiolytic Studies of the Reactions of HO2/O2- with Fe(II)/Fe(III) Ions. The Reactivity of HO2/O2- with Ferric Ions and Its Implication of the Occurrence of the Haber-Weiss Reaction
Rush, James D.,Bielski, Benon H. J.
, p. 5062 - 5066 (2007/10/02)
The reactions between ferrous ion, Fe2+, and the simple complexes of Fe(III), FeOH2+, and FeSO4+ with superoxide and perhydroxyl radicals O2-/HO2 have been studied as a function of pH (1-7) in aqueous sulfate and formate media.The measured rate constants for the various reactions are k17(HO2 + Fe2+) = (1.2 +/- 0.2) X 106 M-1 s-1 (in good agreement with earlier reported values6d); k18(O2- + Fe2+) = (1.0 +/- 0.1) X 107 M-1 s-1; k20(O2- + FeSO4+) ca. k22(O2- + FeOH2+) = (1.5 +/- 0.2) X 108 M-1 s-1.The reduction of FeSO4+ by HO2 is relatively slow, k19(HO2 + FeSO4+) 3 M-1 s-1.At neutral pH the superoxide radical is catlytically decomposed to dioxygen and hydrogen peroxide by trace amounts of Fe(II)/Fe(III), if the overall reaction is completed before Fe(III) can polymerize/precipitate.The corresponding second-order rate constant is kcat = (1.3 +/- 0.2) X 107 M-1 s-1.The results from the kinetic studies of reactions 20 and 22 corroborate the mechanism for the catalytic decomposition of hydrogen peroxide by Fe(II)/Fe(III) advanced by Barb, Baxendale, George, and Hargrave in 1951.2,3
Kinetic Studies of the Electron Transfer Reactions in Iron(II) and Iron(III) Systems. XII. The Ratios of the Reactions Rates of the Outer-sphere vs. Inner-sphere Electron Transfer Mechanisms in the Presence of X1- 1-= Cl1-
Wada, Goro,Inatani, Tomiko,Ichimura, Sachiko
, p. 3441 - 3445 (2007/10/02)
The electron transfer reactions between Fe2+ and FeX2+ (X- = Cl-, SCN-, or N3-) may take place through the inner- or outer-sphere mechanism or through both in parallel.The process of the ou
