Atomistry » Vanadium » Chemical Properties » Potassium Vanadicyanide
Atomistry »
  Vanadium »
    Chemical Properties »
      Potassium Vanadicyanide »

Potassium Vanadicyanide, K3[V(CN)6]

Potassium Vanadicyanide, K3[V(CN)6], is prepared by the addition of excess of concentrated potassium cyanide solution to a concentrated solution of vanadous chloride, VCl3; precipitation in the cold with alcohol gives rise to small rhombohedral plates. The solution is not very stable and rapidly becomes turbid, while addition of an acid produces the green colour which is characteristic of the V••• ion. The complex ion [V(CN)6]''' appears, therefore, to be unstable, unlike the corresponding [Fe(CN)6]''', [Cr(CN)6]''', and [Co(CN)6]''' complex ions. The solution reacts with salts of heavy metals to yield variously coloured precipitates of double cyanides.

An unstable double salt of potassium pyrovanadate and potassium cyanide, K4V2O7.4KCN.14H2O, has been prepared, as well as a complex addition compound of sodium vanadyl cyanide and hexamethylenetetramine, Na3VO(CN)5.2C6H12N4.5H2O.

Last articles

Xe in 6AYK
Xe in 6QII
Xe in 6ASM
Xe in 5NSW
Xe in 6FY9
Xe in 5O1K
Xe in 5O27
Xe in 5M69
Xe in 5KPU
Xe in 5I63
© Copyright 2008-2020 by atomistry.com
Home   |    Site Map   |    Copyright   |    Contact us   |    Privacy