Peroxynitric acid

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Peroxynitric acid
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Names
Preferred IUPAC name
Hydroxy nitrate
Systematic IUPAC name
Hydroxy nitrate [1] [2] [3]
Identifiers
3D model (JSmol)
ChemSpider
PubChem CID
  • Key: UUZZMWZGAZGXSF-UHFFFAOYSA-N Yes check.svgY[ Pubchem ]
  • [N+](=O)([O-])OO
Properties
HNO4
Molar mass 79.011 g·mol−1
Conjugate base Peroxynitrate
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Peroxynitric acid or peroxonitric acid is a chemical compound with the formula HNO4. It is an oxyacid of nitrogen, after peroxynitrous acid.

Contents

Preparation

Peroxynitrate, the conjugate base of peroxynitric acid, is formed rapidly during decomposition of peroxynitrite in neutral conditions. [4]

Atmospheric chemistry

Peroxynitric acid is formed in the atmosphere, although it is unstable, it is important as a reservoir for NO2 through the reversible radical reaction: [5]

HO2NO2 ⇌ HO2• + NO2•

Stability

The pure compound decomposes explosively at −30 °C (−22 °F). Solutions in water or acetic acid of over 70% concentration decompose autocatalytically with resulting explosions. [6]

References

  1. ↑ "Peroxynitric Acid - Compound Summary".
  2. ↑ "peroxynitric acid". PubChem. Retrieved 9 December 2012.
  3. ↑ "125239-87-4". ChemIndex. Retrieved 9 December 2012.
  4. ↑ Miyamoto, S; Ronsein, GE; Corrêa, TC; Martinez, GR; Medeiros, MH; Di Mascio, P (2009). "Direct evidence of singlet molecular oxygen generation from peroxynitrate, a decomposition product of peroxynitrite". Dalton Trans (29): 5720–9. doi:10.1039/b905560f. PMID   20449086.
  5. ↑ Finlayson-Pitts, Barbara J.; Pitts Jr., James N. (2000), "7 - Chemistry of Inorganic Nitrogen Compounds", Chemistry of the Upper and Lower Atmosphere, Elsevier, p. 100, doi:10.1016/B978-012257060-5/50009-5, ISBN   978-0-12-257060-5
  6. ↑ Kaye, Seymour M. (1 January 1978). "P - Peroxides, Inorganic - Table 5 - Explosive Nature of Inorganic Peroxides". Encyclopedia of Explosives and Related Items (PDF) (Technical report). Vol. 8, M1 Thickener through Pyruvonitrolic Acid. Dover, NJ: Army Armament Research And Development Center - Large Caliber Weapon Systems Lab. p. P196. LCCN   61-61759. ADA057762, PATR 2700.


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