Potassium hexacyanochromate(III) explained

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]

Notes and References

1. Book: Potassium Hexacyanochromate (III). F. Hein . S. Herzog . Handbook of Preparative Inorganic Chemistry. 2. 2. G. Brauer. 1373.
2. The insoluble Chromicyanides . Cruser, Frederick Van Dyke . Miller, Edmund H. . J. Am. Chem. Soc. . 1906 . 28 . 9 . 1132–51 . 10.1021/ja01975a003.
3. Book: Inorganic Syntheses. Potassium Hexacyanochromate(III) and Its ¹³C-Enriched Analog. 144. 34. 2004. Valérie . Marvaud. Talal . Mallah. Michel . Verdaguer. 10.1002/0471653683.ch4.
4. 10.1007/BF00618223. The Complex Cyanides of Chromium(II) and Chromium(0) . 1981 . Eaton . Janice P. . Nicholls . David . Transition Metal Chemistry . 6 . 4 . 203–206 . 96193332 .