Potassium hexacyanochromate(III)

Names
IUPAC name

Potassium hexacyanochromate(III)

Identifiers

CAS Number

* 13601-11-1

3D model (JSmol)

* Interactive image

ChemSpider |

* 19988791 Y

EC Number |

* 237-079-8

MeSH | Hexacyanochromate

PubChem CID

* 21123765

InChI

* InChI=1S/6CN.Cr.3K/c6*1-2;;;;/q;;;;;;-3;3*+1 Y

Key: VOCDJOPDZZSPRQ-UHFFFAOYSA-N Y

SMILES

* [K+].[K+].[K+].N#C[Cr-3](C#N)(C#N)(C#N)(C#N)C#N

Properties

Chemical formula

| C6CrK3N6
Molar mass | 325.399 g·mol−1
Appearance  | Vivid, yellow, opaque crystals
Density | 1.71 g/cm3

Solubility in water

| 30.96 g/l00 mL (20 °C)

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Infobox references

Potassium hexacyanochromate(III) is an inorganic compound with the formula K3[Cr(CN)6]. It consists of three potassium cations and [Cr(CN)6]3− anion. It is a yellow, air-stable, paramagnetic solid. It is isomorphous with potassium ferricyanide.

## Synthesis and reactions

The salt is prepared by treating chromium(III) salts with KCN.[1][2][3]

Reduction of hexacyanochromate(III) gives the Cr(II) and Cr(0) derivatives, [Cr(CN)6]4- and [Cr(CN)6]6-, respectively.[4]

## References

1. ↑ F. Hein; S. Herzog. G. Brauer. ed. Handbook of Preparative Inorganic Chemistry. 2 (2 ed.). p. 1373.
2. ↑ Cruser, Frederick Van Dyke; Miller, Edmund H. (1906). "The insoluble Chromicyanides". J. Am. Chem. Soc. 28 (9): 1132–51. doi:10.1021/ja01975a003. https://zenodo.org/record/1428876.
3. ↑ Marvaud, Valérie; Mallah, Talal; Verdaguer, Michel (2004). Potassium Hexacyanochromate(III) and Its 13C-Enriched Analog. Inorganic Syntheses. 34. p. 144. doi:10.1002/0471653683.ch4.
4. ↑ Eaton, Janice P.; Nicholls, David (1981). "The Complex Cyanides of Chromium(II) and Chromium(0)". Transition Metal Chemistry 6 (4): 203–206. doi:10.1007/BF00618223.

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Potassium compounds

* KAsO2
* KBr
* KBrO3
* KCN
* KCNO
* KCl
* KClO
* KClO3
* KClO4
* KF
* KH
* KHCO2
* KHCO3
* KHF2
* KHS
* KHSO3
* KHSO4
* KH2AsO4
* KH2PO3
* KH2PO4
* KI
* KIO3
* KIO4
* KMnO4
* KNH2
* KN3
* K3N
* KNO2
* KNO3
* KOCN
* KOH
* KO2
* KPF6
* KSCN
* KCH3COO
* K2Al2O4
* K2CO3
* K2CrO4
* K2Cr2O7
* K2FeO4
* K2HPO4
* K2MnO4
* K2O
* K2O2
* K2PtCl4
* K2PtCl6
* K2S
* K2SeO4
* K2SO3
* K2SO4
* KHSO5
* K2S2O5
* K2S2O7
* K2S2O8
* K2Po
* K2SiO3
* K3[Fe(CN)6]
* K3[Fe(C2O4)3]
* K4[Fe(CN)6]
* K3PO4
* K4Mo2Cl8

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