Peroxynitrous acid
Names | |
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Preferred IUPAC name
Peroxynitrous acid | |
Systematic IUPAC name | |
Identifiers | |
3D model (JSmol) |
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ChEBI | |
ChEMBL | |
ChemSpider | |
49207 | |
MeSH | Peroxynitrous+Acid |
PubChem CID |
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Properties | |
NHO 3 | |
Molar mass | 63.0128 g mol−1 |
Conjugate base | Peroxynitrite |
Related compounds | |
Related compounds |
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Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Infobox references | |
Peroxynitrous acid (HNO3) is a reactive nitrogen species (RNS). It is the conjugate acid of peroxynitrite (ONOO−). It has a pKa of ~6.8. It is formed in vivo from the diffusion-controlled reaction of nitrogen monoxide (ON•) and superoxide (O•−
2). It isomerises with a rate constant of k = 1.2 s−1, a process whereby up to 5% of hydroxyl and nitrogen dioxide radicals may be formed. It oxidises and nitrates aromatic compounds in low yield. The mechanism may involve a complex between the aromatic compound and ONOOH, and a transition from the cis- to the trans-configuration of ONOOH.[3] Peroxynitrous acid is also important in atmospheric chemistry.
It is an isomer of nitric acid.
References
- ↑ N.Connelly and T. Damhus, IUPAC. Nomenclature of Inorganic Chemistry, RSC Publishing, Cambridge, 2005
- ↑ "Peroxynitrous Acid - Compound Summary". PubChem Compound. USA: National Center for Biotechnology Information. 16 September 2004. Identification and Related Records. Retrieved 11 April 2012.
- ↑ W. H. Koppenol, P. L. Bounds, T. Nauser, R. Kissner, H. Rüegger, "Peroxynitrous acid: controversy and consensus surrounding an enigmatic oxidant", Dalton Trans., 2012, 41, 13779–13787.
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