Based on DFT calculations (B3LYP-GD3BJ/Def2-SVP) the adiabatic electron affinities of the neutral adduct was estimated to be 583 kJ•mol -1 (6.04 eV). The reduction of the corresponding monoanion to the dianion is also highly favourable (310 kJ•mol -1 , 3.21 eV). In comparison, free TCNQ has an experimental electron affinity of 3.38 eV. Consequently, the coordination of Lewis acids clearly increases its oxidation power and underlines our cooperativity concept for such systems.