Ferricyanide - Misplaced Pages

Anion in which a Fe ion is complexed by 6 CN ions Not to be confused with ferrocyanide.

Ferricyanide
Names


IUPAC name iron(3+) hexacyanide
Systematic IUPAC name hexacyanidoferrate(III)
Other names ferric hexacyanide; hexacyanidoferrate(3−); hexacyanoferrate(III)
Identifiers
CAS Number	13408-62-3
3D model (JSmol)	Interactive image
ChEBI	CHEBI:5020
ChemSpider	388349
KEGG	C00324
PubChem CID	439210
CompTox Dashboard (EPA)	DTXSID70894190
InChI InChI=1S/6CN.Fe/c61-2;/q6-1;+3Key: YAGKRVSRTSUGEY-UHFFFAOYSA-N
SMILES N#C(C#N)(C#N)(C#N)(C#N)C#N
Properties
Chemical formula
Related compounds
Other cations	Hexacyanonickelate(III)
Related compounds	Ferrocyanide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C , 100 kPa). Y verify (what is ?) Infobox references

Chemical compound

Ferricyanide is the name of the anion . It is also called hexacyanoferrate(III) and in rare, but systematic nomenclature, hexacyanidoferrate(III). The most common salt of this anion is potassium ferricyanide, a red crystalline material that is used as an oxidant in organic chemistry.

Properties

consists of a Fe center bound in octahedral geometry to six cyanide ligands. The complex has O_h symmetry. The iron is low spin and easily reduced to the related ferrocyanide ion , which is a ferrous (Fe) derivative. This redox couple is reversible and entails no making or breaking of Fe–C bonds:

+ e ⇌

This redox couple is a standard in electrochemistry.

Compared to main group cyanides like potassium cyanide, ferricyanides are much less toxic because of the strong bond between the cyanide ion (CN) and the Fe. They do react with mineral acids, however, to release highly toxic hydrogen cyanide gas.

Uses

Treatment of ferricyanide with iron(II) salts affords the brilliant, long-lasting pigment Prussian blue, the traditional color of blueprints.

References

Gail, E.; Gos, S.; Kulzer, R.; Lorösch, J.; Rubo, A.; Sauer, M.; Kellens, R.; Reddy, J.; Steier, N.; Hasenpusch, W. (October 2011). "Cyano Compounds, Inorganic". Ullmann's Encyclopedia of Industrial Chemistry. Weinheim: Wiley-VCH. doi:10.1002/14356007.a08_159.pub3. ISBN 978-3527306732.