Hydrazine, Hydrogen Peroxide, and Related Hydrides

The resonance energy of benzene makes the substance far less reactive chemically than alkenes or other unsaturated substances. For example, the reaction of addition of one hydrogen molecule to benzene to form cyclohexadiene, 

Both hydrogen peroxide and hydrazine may be described as energy-rich molecules, because of the presence of the relatively unstable O—O and N—N bonds. Both substances are used as rocket propellants. Higher analogues, such as H2O3 and N3H5, have not been made. 

When barium oxide, BaO, is heated to a dull red heat in a stream of air it adds oxygen to form a higher oxide, BaOz, barium peroxide  

Hydrogen peroxide, H2O2, is made by treating barium peroxide with sulfuric acid or phosphoric acid, and distilling  

Commercial hydrogen peroxide is an aqueous solution, sometimes containing a small amount of a stabilizer, such as phosphate ion, to decrease its rate of decomposition to water and oxygen by the reaction 

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