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Cyclic ozone

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Cyclic ozone
Ball and stick model of cyclic ozone
Names
Systematic IUPAC name Trioxirane
Other names
  • Cyclotrioxidane
  • Trioxacyclopropane
Identifiers
CAS Number
3D model (JSmol)
ChemSpider
PubChem CID
CompTox Dashboard (EPA)
InChI
  • InChI=1S/O3/c1-2-3-1Key: XQOAKYYZMDCSIA-UHFFFAOYSA-N
SMILES
  • O1OO1
Properties
Chemical formula O3
Molar mass 47.997 g·mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). ☒N verify (what is  ?) Infobox references
Chemical compound

Cyclic ozone is a theoretically predicted form of ozone. Like ordinary ozone (O3), it would have three oxygen atoms. It would differ from ordinary ozone in how those three oxygen atoms are arranged. In ordinary ozone, the atoms are arranged in a bent line; in cyclic ozone, they would form an equilateral triangle.

Some of the properties of cyclic ozone have been predicted theoretically. It should have more energy than ordinary ozone.

There is evidence that tiny quantities of cyclic ozone exist at the surface of magnesium oxide crystals in air. Cyclic ozone has not been made in bulk, although at least one researcher has attempted to do so using lasers. Another possibility to stabilize this form of oxygen is to produce it inside confined spaces, e.g., fullerene.

It has been speculated that, if cyclic ozone could be made in bulk, and if it proved to have good stability properties, it could be added to liquid oxygen to improve the specific impulse of rocket fuel.

Currently, the possibility of cyclic ozone is confirmed within diverse theoretical approaches.

References

  1. ^ "CID 16206854 - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 11 July 2007. Identification and Related Records. Retrieved 21 October 2011.
  2. Hoffmann, Roald (January–February 2004). "The story of O. The Ring". American Scientist. 92 (1): 23–24. doi:10.1511/2004.1.23.
  3. Plass, Richard; Kenneth Egan; Chris Collazo-Davila; Daniel Grozea; Eric Landree; Laurence D. Marks; Marija Gajdardziska-Josifovska (30 November 1998). "Cyclic Ozone Identified in Magnesium Oxide (111) Surface Reconstructions" (PDF). Physical Review Letters. 81 (22): 4891–4894. Bibcode:1998PhRvL..81.4891P. doi:10.1103/PhysRevLett.81.4891. Retrieved 5 June 2010.
  4. ^ "Temple Researcher Attempting To Create Cyclic Ozone". Science Daily. 8 February 2005. Retrieved 5 June 2010.
  5. ^ Sabirov, Denis; Igor, Shepelevich (2015). "Information entropy of oxygen allotropes. A still open discussion about the closed form of ozone". Computational and Theoretical Chemistry. 1073 (1): 61–66. doi:10.1016/j.comptc.2015.09.016.
  6. Xantheas, Sotiris; Atchity, Gregory; Elbert, Stephen; Ruedenberg, Klaus (1991). "Potential energy surfaces of ozone. I". J. Chem. Phys. 94 (12): 8054. Bibcode:1991JChPh..94.8054X. doi:10.1063/1.460140.
  7. Lee, Timothy (1990). "On the energy separation between the open and cyclic forms of ozone". Chemical Physics Letters. 169 (6): 529–533. Bibcode:1990CPL...169..529L. doi:10.1016/0009-2614(90)85642-P.

External links

Oxygen allotropes
   

Nascent oxygen
O

Dioxygen (singlet and triplet)
O2

Trioxygen (ozone and cyclic ozone)
O3

Tetraoxygen
O4

Octaoxygen
O8

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