Interaction between CO2 and Electrochemically Reduced Species of N-propyl-4,4′-bipyridinium Cation

The one-electron reduced species of N-propyl-4,4′-bipyridinium cation (1+) which is generated under electrolysis at −1.1 V vs. SCE was found to be able to react with CO2 although it is even a neutral radical. The intermediate CO2 adduct was furthermore reduced by one-electron at the same electrolysis potential to form a stable CO2 adduct.