In
chemistry, a fluoroanion or fluorometallate anion is a
polyatomic anion
A polyatomic ion, also known as a molecular ion, is a covalent bonded set of two or more atoms, or of a metal complex, that can be considered to behave as a single unit and that has a net charge that is not zero. The term molecule may or may no ...
that contains one or more
fluorine atoms. The ions and salts form from them are also known as complex fluorides. They can occur in
salts
In chemistry, a salt is a chemical compound consisting of an ionic assembly of positively charged cations and negatively charged anions, which results in a compound with no net electric charge. A common example is table salt, with positively c ...
, or in solution, but seldom as pure
acids. Fluoroanions often contain elements in higher
oxidation state
In chemistry, the oxidation state, or oxidation number, is the hypothetical charge of an atom if all of its bonds to different atoms were fully ionic. It describes the degree of oxidation (loss of electrons) of an atom in a chemical compound. C ...
s. They mostly can be considered as fluorometallates, which are a subclass of halometallates.
The following is a list of fluoroanions in
atomic number
The atomic number or nuclear charge number (symbol ''Z'') of a chemical element is the charge number of an atomic nucleus. For ordinary nuclei, this is equal to the proton number (''n''p) or the number of protons found in the nucleus of every ...
order.
*
trifluoroberyllate
*
tetrafluoroberyllate
*
tetrafluoroborate
Tetrafluoroborate is the anion . This tetrahedral species is isoelectronic with tetrafluoroberyllate (), tetrafluoromethane (CF4), and tetrafluoroammonium () and is valence isoelectronic with many stable and important species including the perchlo ...
*
magnesium tetrafluoride
*
tetrafluoroaluminate
*
hexafluoroaluminate
*
hexafluorosilicate
Hexafluorosilicic acid is an inorganic compound with the chemical formula . Aqueous solutions of hexafluorosilicic acid consist of salts of the cation and hexafluorosilicate anion. These salts and their aqueous solutions are colorless.
Hexafluo ...
*
hexafluorophosphate
Hexafluorophosphate is an anion with chemical formula of . It is an octahedral species that imparts no color to its salts. is isoelectronic with sulfur hexafluoride, , and the hexafluorosilicate dianion, , and hexafluoroantimonate . In this an ...
*
Sulfur trifluoride anion
*
pentafluorosulfate aka pentafluorosulfite or Sulfur pentafluoride ion
*
sulfur pentafluoride anion
*
tetrafluorochlorate
*
hexafluorotitanate
*
hexafluorovanadate(III)
*
hexafluorovanadate(IV)
*
hexafluorovanadate(V)
*
trifluoromanganate
*
hexafluoromanganate(III)
*
hexafluoromanganate(IV)
*
heptafluoromanganate IV
*
Tetrafluoroferrate 1− and 2−
*
hexafluoroferrate 4− and 3−
*
tetrafluorocobaltate II
*
Hexafluorocobaltate III and IV
*
Heptafluorocobaltate IV
*
Tetrafluoronickelate
The fluoronickelates are a class of chemical compounds containing an anion with nickel at its core, surrounded by fluoride ions which act as ligands. This makes it a fluoroanion
In chemistry, a fluoroanion or fluorometallate anion is a polyatomi ...
*
Hexafluoronickelate II, III and IV
*
hexafluorocuprate
*
tetrafluorozincate
*
Hexafluorogallate
*
hexafluorogermanate
*
hexafluoroarsenate
The hexafluoroarsenate (sometimes shortened to fluoroarsenate) anion is a chemical species with formula . Hexafluoroarsenate is relatively inert, being the conjugate base of the notional superacid hexafluoroarsenic acid ().
Synthesis
The firs ...
*
tetrafluorobromate
*
hexafluorobromate
*
pentafluorozirconate
*
hexafluorozirconate
*
octafluorozirconate
*
hexafluoroniobate
*
heptafluoroniobate
*
octafluoromolybdate
*
tetrafluoropalladate
*
hexafluororhodate
*
hexafluororuthenate(IV)
*
hexafluororuthenate(V)
*
hexafluoroindate
*
hexafluorostannate
*
fluoroantimonate
*
hexafluoroiodate 1−
*
octafluoroxenate
*
tetrafluorolanthanate
*
pentafluorocerate IV
*
Hexafluorocerate IV
[
* Heptafluorocerate IV][
* octafluorocerate IV]
References
{{Reflist
Fluorine compounds
Anions
Double salts