bifluoride ion
Sign in to saveAlso known as bifluoride, HF2-, FHF-, hydrogen difluoride ion
The bifluoride ion is an inorganic anion with the chemical formula . The anion is colorless. Salts of bifluoride are commonly encountered in the reactions of fluoride salts with hydrofluoric acid. The commercial production of fluorine involves electrolysis of bifluoride salts.
Wikidata facts
- Has part
- three-center four-electron bond
- Mass
- 39.0047
Show 4 more facts
- Commons category
- Bifluoride ion
- canonical SMILES
- [H-](F)F
- different from
- fluoronium ion
- chemical formula
- HF₂⁻
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Encyclopedic overview
3 sectionsContents
- Structure and bonding
- Reactions
- References
The bifluoride ion is an inorganic anion with the chemical formula . The anion is colorless. Salts of bifluoride are commonly encountered in the reactions of fluoride salts with hydrofluoric acid. The commercial production of fluorine involves electrolysis of bifluoride salts.
==Structure and bonding== The bifluoride ion has a linear, centrosymmetric structure (D∞h symmetry), with an F−H bond length of 114 pm. The bond strength is estimated to be greater than 155 kJ/mol. In molecular orbital theory, the atoms are modeled to be held together by a 3-center 4-electron bond (symmetrical hydrogen bond), in a sort of hybrid between a hydrogen bond and a covalent bond.
Excerpted from Wikipedia’s “bifluoride ion” article, available under the CC BY-SA 4.0 licence.