The same effect can be observed in nonaqueous media in the presence of strongly interacting cations, including Li+ as well as divalent cations such as Mg2+, at potentials that may be as high as 4 V versus Li75. Organic Li-oxocarbon salts can also react reversibly with Li. For example, Li2C6O6 reacts with 4 additional Li+, albeit with poor cycling behaviour74. Similarly, substituted organic molecules containing N, O and S heterocycles can be reversibly oxidized and reduced. These molecules are generally more stable and can show stable and reversible redox activity76.