Dichlorine hexoxide
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| Molar mass | 166.901 g/mol |
| Appearance | red liquid |
| Density | 1.65 g/cm3 |
| Melting point | Template:Chembox CalcTemperatures |
| Boiling point | Template:Chembox CalcTemperatures |
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Dichlorine hexoxide is the chemical compound with the molecular formula Template:Chem2 or Template:Chem2, which is correct for its gaseous state. However, in liquid or solid form, this chlorine oxide ionizes into the dark red ionic compound chloryl perchlorate or dioxochloronium(V) perchlorate Template:Chem2, which may be thought of as the mixed anhydride of chloric and perchloric acids. This compound is a notable perchlorating agent.[1]
It is produced by reaction between chlorine dioxide and excess ozone:
Molecular structure
It was originally reported to exist as the monomeric chlorine trioxide Template:Chem2 in gas phase,[2] but was later shown to remain an oxygen-bridged dimer after evaporation and until thermal decomposition into chlorine perchlorate, Template:Chem2, and oxygen.[3] The compound Template:Chem2 was then rediscovered.[4]
It is a dark red fuming liquid at room temperature that crystallizes as a red ionic compound, chloryl perchlorate, Template:Chem2. The red color shows the presence of chloryl ions. Thus, chlorine's formal oxidation state in this compound remains a mixture of chlorine(V) and chlorine(VII) both in the gas phase and when condensed; however by breaking one oxygen-chlorine bond some electron density does shifts towards the chlorine(VII).
Properties
Template:Chem2 is diamagnetic and is a very strong oxidizing agent. Although stable at room temperature, it explodes violently on contact with organic compounds[5] It is a strong dehydrating agent:
Many reactions involving Template:Chem2 reflect its ionic structure, Template:Chem2, including the following:[6]
It reacts with gold to produce the chloryl salt [[chloryl tetraperchloratoaurate|Template:Chem2]]:[7]
Several other transition metal perchlorate complexes are prepared using dichlorine hexoxide.
Nevertheless, it can also react as a source of the Template:Chem2 radical:Script error: No such module "Unsubst".
Synthesis
- Template:Chem2 (under ultraviolet light)
References
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