Tetraoxidane

Tetraoxidane

Names
IUPAC name Tetraoxidane
Other names Hydroxyperoxide, dihydrogen tetroxide, diperoxide, bisperoxide
Identifiers
CAS Number	29683-94-1
3D model (JSmol)	Interactive image
ChemSpider	4417295
PubChem CID	5250043
InChI InChI=1S/H2O4/c1-3-4-2/h1-2H Key: RSPISYXLHRIGJD-UHFFFAOYSA-N
SMILES OOOO
Properties
Chemical formula	H2O4
Molar mass	66.012 g·mol−1
Density	1.8±0.1 g/cm3
Related compounds
Related compounds	Water Hydrogen peroxide Trioxidane Pentaoxidane
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Tetraoxidane is an inorganic compound of hydrogen and oxygen with the chemical formula H₂O₄. ^{[1] [2] [3]} This is one of the unstable hydrogen polyoxides. ^[4]

Synthesis

The compound is prepared by a chemical reaction between hydroperoxyl radicals (HOO•) at low temperatures: ^{[5] [6]}

2 HOO• ⇌ H₂O₄

Physical properties

This is the fourth member of the polyoxidanes. The first three are water (oxidane), hydrogen peroxide (dioxidane), and trioxidane. Tetraoxidane is more unstable than the previous compounds. The term "tetraoxidane" extends beyond the parent compound to several daughter compounds of the general formula R₂O₄, where R can be hydrogen, halogen, or various inorganic and organic monovalent radicals. The two Rs together can be replaced by a divalent radical, so heterocyclic tetraoxidanes also exist. ^[7]

Ionization

Tetraoxidane autoionizes when in liquid form:

H₂O₄ ⇌ H⁺ + HO−4

2 H₂O₄ ⇌ H₃O+4 + HO−4

See also

• Hydrogen polyoxide

References

1. Mckay, Daniel J.; Wright, James S. (1 February 1998). "How Long Can You Make an Oxygen Chain?" . Journal of the American Chemical Society . 120 (5): 1003–1013. doi:10.1021/ja971534b. ISSN   0002-7863 . Retrieved 16 May 2023.
2. "hydroxyperoxide". ChemScr. Retrieved 15 May 2023.
3. The Chemistry of Peroxides, Volume 3. John Wiley & Sons. 20 April 2015. p. 198. ISBN   978-1-118-41271-8 . Retrieved 15 May 2023.
4. "Selected ATcT [1, 2] enthalpy of formation based on version 1.122 of the Thermochemical Network [3]". atct.anl.gov. Retrieved 15 May 2023.
5. Levanov, Alexander V.; Sakharov, Dmitri V.; Dashkova, Anna V.; Antipenko, Ewald E.; Lunin, Valeri V. (2011). "Synthesis of Hydrogen Polyoxides H2O4 and H2O3 and Their Characterization by Raman Spectroscopy". European Journal of Inorganic Chemistry . 2011 (33): 5144–5150. doi:10.1002/ejic.201100767.
6. Möller, Detlev (19 February 2019). Fundamentals and Processes. Walter de Gruyter GmbH & Co KG. p. 276. ISBN   978-3-11-056126-5 . Retrieved 15 May 2023.
7. Curutchet, Antton; Colinet, Pauline; Michel, Carine; Steinmann, Stephan N.; Le Bahers, Tangui (2020). "Two-sites are better than one: revisiting the OER mechanism on CoOOH by DFT with electrode polarization" (PDF). Physical Chemistry Chemical Physics . 22 (13): 7031–7038. Bibcode:2020PCCP...22.7031C. doi:10.1039/D0CP00281J. PMID   32195492. S2CID   213191538 . Retrieved 15 May 2023.