File:H2FSbF6.svg · Wikimedia Commons · See Wikimedia Commons
fluoroantimonic acid
Sign in to saveAlso known as hexafluoroantimonic acid, fluoroantimonic(V) acid, hydrogen fluoroantimonate, fluoronium fluoroantimonate, fluoronium hexafluoroantimonate
chemical compound
Chemical data
- Formula
- F6HSb-5
- Molecular weight
- 236.758 g/mol
- SMILES
- [H+].[F-].[F-].[F-].[F-].[F-].[F-].[Sb]
- InChIKey
- FQWDRCSQRKAYKW-UHFFFAOYSA-I
- Polar surface area
- 0 Ų
- H-bond donors
- 1
- H-bond acceptors
- 6
- Formal charge
- -5
via PubChem
Wikidata facts
- Subclass of
- mineral acid
- Has part
- fluorine
- Mass
- 235.90480295155
- Image
- Fluoroantimonic acid bottle.png
Show 4 more facts
- Commons category
- Fluoroantimonic acid
- chemical formula
- HSbF₆
- canonical SMILES
- F[Sb-](F)(F)(F)(F)[FH+]
- has characteristic
- superacid
Sources (1)
via Wikidata · CC0
~6 min read
Encyclopedic overview
Fluoroantimonic acid is a mixture of hydrogen fluoride and antimony pentafluoride, containing various cations and anions, the simplest being fluoronium ( H2F) and fluoroantimonate (SbF−6). The mixture is the strongest known superacid, stronger than pure sulfuric acid by many orders of magnitude, according to its Hammett acidity function. It even protonates some hydrocarbons to afford pentacoordinate carbocations (carbonium ions). Like its precursor hydrogen fluoride, it attacks glass, but can be stored in containers lined with PTFE (Teflon).
Chemical composition
Excerpted from Wikipedia’s “fluoroantimonic acid” article, available under the CC BY-SA 4.0 licence.