Peroxynitrous acid
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Names | |
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Preferred IUPAC name Peroxynitrous acid[citation needed] | |
Systematic IUPAC name (Hydridodioxido)oxidonitrogen[1][2] | |
Identifiers | |
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3D model (JSmol) |
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ChEBI |
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ChEMBL |
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ChemSpider |
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Gmelin Reference | 49207 |
MeSH | Peroxynitrous+Acid |
PubChem CID |
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CompTox Dashboard (EPA) |
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InChI
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Properties | |
Chemical formula | NHO 3 |
Molar mass | 63.0128 g mol−1 |
Conjugate base | Peroxynitrite |
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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 |
Chemical compound
Peroxynitrous acid (HNO3) is a reactive nitrogen species (RNS). It is the conjugate acid of peroxynitrite (ONOO−). It has a pKa of approximately 6.8. It is formed in vivo from the diffusion-controlled reaction of nitrogen monoxide (ON•) and superoxide (O•−
2). It is an isomer of nitric acid and 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.
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.
- ^ Koppenol, W. H.; Bounds, P. L.; Nauser, T.; Kissner, R.; Rüegger, H. (2012). "Peroxynitrous acid: controversy and consensus surrounding an enigmatic oxidant". Dalton Transactions. 41: 13779–13787.
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Nitrogen species
- NH3
- NH4+
- NH2−
- N3−
- NH2OH
- N2H4
- HN3
- N3−
- NH5 (?)
- NF
- NF2
- NF3
- NF5 (?)
- NCl3
- NBr3
- NI3
- FN3
- ClN3
- BrN3
- IN3
- NH2F
- N2F2
- NH2Cl
- NHF2
- NHCl2
- NHBr2
- NHI2