Hydrogen peroxide, thermodynamic properties

Rabinovich s collection of data includes some thermodynamic properties of carbon dioxide, water, lithium, mercury, ethylene, butene, halogenated monosilanes and methanes, liquid ammonia, and hydrogen peroxide, and the densities of liquid alkali metals. 

A property of superoxide to act as an oxidizing agent is much more ambiguous. Thermodynamically, an electron transfer to bare superoxide is almost impossible because the product of this reaction, peroxide dianion (02 ), is highly imstable. Therefore, the reduction of superoxide is either a proton-coupled process (Eq. (3)) or metal-assisted reaction (Eq. (4)), where the latter requires coordination of 02 and subsequent inner-sphere electron transfer. It is also possible to think in terms of hydrogen atom transfer reactions as a special sort of proton-coupled electron-transfer processes (Eq. (5)). 

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