H2O5

H2O5, also known as dihydrogen pentoxide or hydrogen peroxide dimer, is a chemical compound with the molecular formula H2O5. It is an unstable and highly reactive allotrope of oxygen. This compound is considered to be a peroxide of hydrogen and is related to hydrogen peroxide (H2O2). Its structure is thought to involve two hydrogen atoms bonded to two oxygen atoms which are in turn bonded to three other oxygen atoms, forming an O-O-O linkage.

H2O5 is extremely unstable and tends to decompose rapidly into oxygen and water. Due to its instability, it is not a commonly encountered substance and is primarily of theoretical interest or observed under very specific experimental conditions. Its synthesis is challenging, and it is typically produced in very small quantities at low temperatures. Research into H2O5 has explored its potential as a powerful oxidizing agent, but its hazardous nature and short lifespan limit practical applications. Its properties are still an active area of investigation in chemistry.