Potassium hexacyanochromate(III)

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Potassium hexacyanochromate(III)
Potassium hexacyanochromate(III), recrystallised from cold water.
The crystals of potassium hexacyanochromate(III) after three recrystallisations
Names
IUPAC name
Potassium hexacyanochromate(III)
Identifiers
3D model (
JSmol
)
ChemSpider
ECHA InfoCard
 100.033.694 Edit this at Wikidata
EC Number
  • 237-079-8
MeSH Hexacyanochromate
  • InChI=1S/6CN.Cr.3K/c6*1-2;;;;/q;;;;;;-3;3*+1 checkY
    Key: VOCDJOPDZZSPRQ-UHFFFAOYSA-N checkY
  • [K+].[K+].[K+].N#C[Cr-3](C#N)(C#N)(C#N)(C#N)C#N
Properties
C6CrK3N6
Molar mass 325.399 g·mol−1
Appearance Vivid, yellow, opaque crystals
Density 1.71 g/cm3
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).

Potassium hexacyanochromate(III) is an

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. "Potassium Hexacyanochromate (III)". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry. Vol. 2 (2 ed.). p. 1373.
  2. doi:10.1021/ja01975a003
    .
  3. doi:10.1002/0471653683.ch4
    .
  4. S2CID 96193332
    .
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