Potassium hexacyanochromate(III)

Potassium hexacyanochromate(III)
Names
	IUPAC name Potassium hexacyanochromate(III)
Identifiers
CAS Number	13601-11-1;
3D model (JSmol)	Interactive image;
ChemSpider	19988791 ;
ECHA InfoCard	100.033.694
EC Number	237-079-8;
MeSH	Hexacyanochromate
PubChem CID	21123765;
CompTox Dashboard (EPA)	DTXSID10929218 ;
	InChI InChI=1S/6CN.Cr.3K/c61-2;;;;/q;;;;;;-3;3+1 Key: VOCDJOPDZZSPRQ-UHFFFAOYSA-N ;
	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

^ F. Hein; S. Herzog. "Potassium Hexacyanochromate (III)". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry. Vol. 2 (2 ed.). p. 1373.
^ Cruser, Frederick Van Dyke; Miller, Edmund H. (1906). "The insoluble Chromicyanides". J. Am. Chem. Soc. 28 (9): 1132–51. doi:10.1021/ja01975a003.
^ Marvaud, Valérie; Mallah, Talal; Verdaguer, Michel (2004). Potassium Hexacyanochromate(III) and Its ¹³C-Enriched Analog. Inorganic Syntheses. Vol. 34. p. 144. doi:10.1002/0471653683.ch4.
^ 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. S2CID 96193332.

[1] F. Hein; S. Herzog. "Potassium Hexacyanochromate (III)". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry. Vol. 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.

[3] Marvaud, Valérie; Mallah, Talal; Verdaguer, Michel (2004). Potassium Hexacyanochromate(III) and Its ¹³C-Enriched Analog. Inorganic Syntheses. Vol. 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. S2CID 96193332.

[1]

[2]

[3]

[4]