-TEMPO radicals are initially partially oxidized to oxoammonium cations (TEMPO⁺) by BF₃ species from the BF₃-CH3CN complex, resulting in a transiently reduced form of BF₃, denoted as To investigate the evolution of the species in the reactional medium, both scenarios of TEMPO-X formation were simulated using the KISSA electrochemical simulator. The resulting [TEMPO-X] concentrations as function of [BF₃]/[TEMPO] ratio are represented in Figure . plateaus when non-redox species are generated according to scenario 1, whereas in scenario 2, it reaches a maximum before slowly decreasing until it reaches a pseudo-plateau. To determine which hypothesis is supported by the experimental data, we analyzed both anodic and cathodic currents during the redox process. These currents, which indicate changes in reaction species concentrations, were extracted from voltammograms recorded with varying molar amounts of BF₃-CH3CN. The resulting currents were then plotted as a function of the [BF₃]/[TEMPO] ratio in Figure . The oxidation current reflects the concentration of radical species ([TEMPO]), the reduction current reflects the concentration of oxidized species ([TEMPO + ]). Notably, for any ratio x = [BF3]/[TEMPO], the total concentration of species (S) remains constant and equal to the initial amount of TEMPO radical species introduced ([TEMPO]0):