|Systematic IUPAC name
|Molar mass||21.01428 g mol−1|
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|what is: / ?)(|
Fluoronium (systematically named fluoranium, and μ-fluorido-dihydrogen(1+)) is an inorganic cation with the chemical formula H
(also written [H
). It contributes no colour to fluoronium salts. It is a very strong acid, dilute fluoronium solutions are corrosive and can attack the skin. It can be formed by protonation or self-ionic dissociation of hydrogen fluoride:
- HF + H+ → H2F+
- 3HF ⇌ H2F+ + HF−
The kinetic instability of the fluoronium ion is responsible for the extreme acidity of fluoroantimonic acid. The antimony pentafluoride molecule sequesters the fluoride ion produced by the homoassociation of hydrogen fluoride, leaving the fluoronium ion unable to revert to the more stable neutral hydrogen fluoride.
- "Fluoronium (CHEBI:50314)". Chemical Entities of Biological Interest (ChEBI). UK: European Bioinformatics Institute.
- George A. Olah, John R. DeMember (1970). "Friedel-Crafts chemistry. V. Isolation, carbon-13 nuclear magnetic resonance, and laser Raman spectroscopic study of dimethylhalonium fluoroantimonates". J. Am. Chem. Soc. 92 (3): 718. doi:10.1021/ja00706a058.
- Ritter, Stephen K. "Concentrates: Fluorine’s Positive Side Revealed". Chemical & Engineering News 91 (14): 36.