Figure 4.

Calculation procedure for the initial formation rates of the intermediates I₁ and I₂, produced upon S transformation, using the initial slope (graphical) technique. The initial formation rate of I₁ is {R₁ [mol L⁻¹ s⁻¹]} ≅ {[S]_o [mol L⁻¹]} (2.75 days × 3600 × 24)⁻¹. The initial formation rate of I₂ is {R₂ [mol L⁻¹ s⁻¹]} ≅ 0.95 {[S]_o [mol L⁻¹]} (10 days × 3600 × 24)⁻¹.