Antioxidative Reactivity of L-Ascorbic Acid and D-Isoascorbic Acid Species towards Reduction of Hexachloroiridate (IV)

Figure 4

Second-order rate constants k′ (in logarithmic scale) versus pH plots at 25.0°C and 1.0 M ionic strength (data points) for reduction of [IrCl₆]^2– by AA and IAA. The solid lines represent the best fits of equation (6) to the experimental data by use of a weighted nonlinear least-squares method.