19513-45-2Relevant academic research and scientific papers
EPR Investigation into the Kinetics and Mechanism of the One-electron Reduction of Benzenediazonium Ions by FeII-EDTA and other Iron(II) complexes
Gilbert, Bruce C.,Hanson, Peter,Jones, Jason R.,Whitwood, Adrian C.,Timms, Allan W.
, p. 629 - 636 (2007/10/02)
An EPR approach has been developed and applied to the determination of the rate constants for the decomposition of some arenediazonium ions by FeII complexes to give aryl radicals.In continuous-flow experiments, steady-state concentrations have been measured both for the aryl radical-adducts to the fumarate anion and for .CH2CO2- (obtained by reaction of Ar. with the iodoacetate anion): analysis of the dependence of these upon II> and +> leads to values of the rate constants for electron transfer.For the reaction between FeII-EDTA and a seriesof diazonium ions, for which values of k are in the range 2*104 - 4*105 dm3 mol-1 s-1, it is shown that there is a good dual-parameter Hammett-Taft correlation (involving ?I and ?R+, and with ρ = 1.74), consistent with the occurrence of an outer-sphere electron-transfer process.
