Lyonium ion
{{short description|Positively-charged ion made by protonating a solvent molecule}}
In chemistry, a lyonium ion is the cation derived by the protonation of a solvent molecule.[http://goldbook.iupac.org/html/L/L03654.html IUPAC Gold Book - lyonium ion] For example, a hydronium ion is formed by the protonation of water, and {{chem2|CH3OH2+}} is the cation formed by the protonation of methanol.
Its counterpart is a lyate ion, the anion formed by the deprotonation of a solvent molecule.
Lyonium and lyate ions, resulting from molecular autoionization, contribute to the molar conductivity of protolytic solvents.
Examples
{{Lyate-Lyonium Ion Examples}}
See also
- Lyate ion, a deprotonated solvent molecule
- Onium ion, a protonated molecule more generally
- Ion transport number
- Ionic atmosphere