In the dC12TEMPONOBF₄ compound (obtained with 2.4 equivalents of NOBF₄), the TEMPO group is predominantly in its oxidized oxoammonium form (TEMPO⁺), in equilibrium with its radical form, both of which are electroactive. In contrast, the dC12TEMPOtBuONO/BF₃ compound (obtained with an excess of 2.4 equivalents of BF₃) contains TEMPO in both its TEMPO⁺ and TEMPO-X forms, the latter being nonredox-active. This explains the overall signal decrease observed in the cyclic voltammogram shown in Figure .