Nitrosyl iodide

Nitrosyl iodide

Skeletal formula of nitrosyl iodide
Ball and stick model of nitrosyl iodide
Names
IUPAC name Nitrosyl iodide
Identifiers
CAS Number	58585-94-7
3D model (JSmol)	Interactive image
ChemSpider	126649
PubChem CID	143560
CompTox Dashboard (EPA)	DTXSID80207297
InChI InChI=1S/INO/c1-2-3 Key: VBAXOVGEFYCYMW-UHFFFAOYSA-N
SMILES N(=O)I
Properties
Chemical formula	INO
Molar mass	156.910 g·mol−1
Solubility in water	reacts with water
Hazards
GHS labelling:
Pictograms
Related compounds
Related compounds	Nitroxyl Nitrosyl chloride Nitrosyl fluoride Nitrosyl bromide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). Infobox references

Nitrosyl iodide is an organic chemical compound of nitrogen, oxygen, and iodine with the molecular formula NOI. ^[1] This is the simplest compound, among the family of INOx (x = 1 to 3), to be viewed as important temporary reservoir species for iodine and nitrogen oxides. ^{[2] [3]}

Synthesis

Nitrosyl iodide is formed in a reaction of nitric oxide with iodine: ^[4]

2NO + I₂ → 2NOI

Other methods are also known.

Physical properties

The compound is soluble in organic solvents. It reacts with water.

The compound is unstable and quickly decomposes: ^[5]

2NOI → 2NO + I₂

Nitrosyl iodide is believed to impact tropospheric ozone levels. ^[6]

References

1. "Nitrosyl iodide". NIST . Retrieved 15 January 2026.
2. Ozeki, Hiroyuki; Bailleux, Stephane; Kobayashi, Kaori; Nishitsunoi, Akiko (22 June 2021). "Hyperfine Structure of Nitrosyl Iodide (Ino)". Proceedings of the 2021 International Symposium on Molecular Spectroscopy. International Symposium on Molecular Spectroscopy (Virtual). p. 1. Bibcode:2021isms.confEFD04N. doi:10.15278/isms.2021.FD04. hdl:2142/111294. ISBN   978-1-7138-3523-3 . Retrieved 15 January 2026.
3. Hojo, Masashi (12 September 2025). Fundamental Coordination Ability of s-Block Metal Ions: New Aspects and Its Role in Solution Reactions. Elsevier. p. 16-197. ISBN   978-0-12-821981-2 . Retrieved 15 January 2026.
4. Advances in Physical Organic Chemistry. Academic Press. 30 December 1982. p. 403. ISBN   978-0-08-058158-3 . Retrieved 15 January 2026.
5. Wiberg, Egon; Wiberg, Nils (2001). Inorganic Chemistry. Academic Press. p. 666. ISBN   978-0-12-352651-9 . Retrieved 15 January 2026.
6. Bailleux, S.; Duflot, D.; Aiba, S.; Nakahama, S.; Ozeki, H. (16 April 2016). "Nitrosyl iodide, INO: A combined ab initio and high-resolution spectroscopic study". Chemical Physics Letters . 650: 73–75. Bibcode:2016CPL...650...73B. doi:10.1016/j.cplett.2016.02.069. ISSN   0009-2614 . Retrieved 15 January 2026.