Nitroxyl

Nitroxyl
Ball and stick model of nitroxyl
Names
IUPAC name
Azanone
Systematic IUPAC name
Oxidanimine[1]
Other names
Hydrogen nitroxide

Hydrogen oxonitrate(I)
Hyponitrous acid monomer
Nitronous oxide

Nitrosyl hydride
Identifiers
3D model (JSmol)
ChEMBL
ChemSpider
MeSH Nitroxyl
UNII
  • InChI=1S/HNO/c1-2/h1H checkY
    Key: ODUCDPQEXGNKDN-UHFFFAOYSA-N checkY
  • N=O
Properties
HNO
Molar mass 31.014 g·mol−1
log P 0.74
Structure
Digonal
Bent
Thermochemistry
33.88 J K−1 mol−1
220.91 J K−1 mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Nitroxyl (common name) or azanone (IUPAC name)[2] is the chemical compound HNO. It is well known in the gas phase.[3][4] Nitroxyl can be formed as a short-lived intermediate in the solution phase. The conjugate base, NO−, nitroxide anion, is the reduced form of nitric oxide (NO) and is isoelectronic with dioxygen. The bond dissociation energy of H−NO is 49.5 kcal/mol (207 kJ/mol), which is unusually weak for a bond to the hydrogen atom.

  1. ^ "Nitroxyl". PubChem. Retrieved August 24, 2022.
  2. ^ Doctorovich, F.; Bikiel, D.; Pellegrino, J.; Suárez, S. A.; Larsen, A.; Martí, M. A. (2011). "Nitroxyl (azanone) trapping by metalloporphyrins". Coordination Chemistry Reviews. 255 (23–24): 2764–2784. doi:10.1016/j.ccr.2011.04.012. hdl:11336/68714.
  3. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  4. ^ Wiberg, Egon; Holleman, Arnold Frederick (2001). Inorganic Chemistry. Elsevier. ISBN 978-0-12-352651-9.