Dichlorine trioxide, Cl₂O₃, is a

chlorine oxide Chlorine and oxygen can bond in many ways: * chlorine monoxide, , chlorine (II) oxide * chlorine peroxide, , dimer of chlorine (II) oxide * chlorine dioxide, , chlorine (IV) oxide * chloroperoxyl, *chlorine trioxide, ClO3, chlorine (VI) oxide * ...

. It is a dark brown solid discovered in 1967 which is explosive even below 0 °C. It is formed by the low-temperature photolysis of ClO₂ and is formed along with Cl₂O₆, Cl₂ and O₂. Its structure is believed to be OCl−ClO₂ with possible isomers such as Cl−O−ClO₂.Egon Wiberg, Arnold Frederick Holleman (2001) ''Inorganic Chemistry'', Elsevier The isomer having a structure of OCl–O–ClO would be the theoretical

anhydride An organic acid anhydride is an acid anhydride that is an organic compound. An acid anhydride is a compound that has two acyl groups bonded to the same oxygen atom. A common type of organic acid anhydride is a carboxylic anhydride, where the pa ...

chlorous acid Chlorous acid is an inorganic compound with the formula HClO2. It is a weak acid. Chlorine has oxidation state +3 in this acid. The pure substance is unstable, disproportionating to hypochlorous acid (Cl oxidation state +1) and chloric acid (C ...

References

Chlorine oxides Chlorine(V) compounds Sesquioxides Substances discovered in the 1960s Explosive chemicals {{Inorganic-compound-stub