fulminic acid
Also known as H-C#NO, [C(H)NO], [CH(NO)], HCNO, hydrogen cyanide N-oxide, methylidyne(oxo)-lambda(5)-azane, (methylidyneammoniumyl)oxidanide
chemical compound
Chemical data
- Formula
- CHNO
- Molecular weight
- 43.025 g/mol
- IUPAC name
- formonitrile oxide
- SMILES
- C#[N+][O-]
- InChIKey
- UXKUODQYLDZXDL-UHFFFAOYSA-N
- XLogP
- -0.5
- Polar surface area
- 30.7 Ų
- H-bond donors
- 0
- H-bond acceptors
- 1
- Formal charge
- 0
via PubChem
~3 min read
Article
Fulminic acid is an acid with the formula HCNO, more specifically H−C≡N−O. It is an isomer of isocyanic acid (H−N=C=O) and of its elusive tautomer, cyanic acid (H−O−C≡N), and also of isofulminic acid (H−O−N≡C).
Fulminate is the anion [C≡N−O] of any of its salts. For historical reasons, the fulminate functional group is understood to be −O−N≡C as in isofulminic acid; whereas the group −C≡NO is called nitrile oxide.