Cyclic ozone

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Cyclic ozone
Ball and stick model of cyclic ozone
Systematic IUPAC name
153851-84-4 N
ChemSpider 13375217 YesY
Jmol-3D images Image
PubChem 16206854
Molar mass 48.00 g·mol−1
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
 N verify (what isYesY/N?)
Infobox references

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 properties of cyclic ozone have been predicted theoretically. It should have more energy than ordinary ozone.[2]

There is evidence that tiny quantities of cyclic ozone exist at the surface of magnesium oxide crystals in air.[3] Cyclic ozone has not been made in bulk, although at least one researcher has attempted to do so using lasers.[4]

It has been speculated that, if cyclic ozone could be made in bulk, and it proved to have good stability properties,[clarification needed] it could be added to liquid oxygen to improve the specific impulse of rocket fuel.[4]


  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. Retrieved 2010-06-05. 
  3. ^ Plass, Richard; Kenneth Egan; Chris Collazo-Davila; Daniel Grozea; Eric Landree; Laurence D. Marks; Marija Gajdardziska-Josifovska (November 30, 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 2010-06-05. 
  4. ^ a b "Temple Researcher Attempting To Create Cyclic Ozone". Science Daily. February 8, 2005. Retrieved 2010-06-05.