Chemical elements
  Ruthenium
    Isotopes
    Energy
    Production
    Application
    Physical Properties
    Chemical Properties
      Ruthenium Fluoride
      Ruthenium Dichloride
      Ruthenium Trichloride
      Ruthenochlorides
      Potassium Chlor-ruthenate
      Potassium Aquo-chlor-ruthenate
      Caesium Aquo-chlor-ruthenate
      Ruthenium Oxychlorides
      Potassium Bromruthenite
      Potassium Bromruthenate
      Potassium Aquobromruthenate
      Ruthenium Tri-iodide
      Ruthenium Sesquioxide
      Hydrated Ruthenium Sesquioxide
      Ruthenium Dioxide
      Ruthenium Tetroxide
      Ruthenium Sesquisulphide
      Ruthenium Disulphide
      Ruthenium Trisulphide
      Ruthenium Sesquisulphite
      Ruthenium Dithionate
      Ruthenium Sulphate
      Ruthenium Nitrosotrihydroxide
      Potassium Nitrosochloivifuthenate
      Ammonium Nitrosochlor-ruthenate
      Rubidium Nitrosochlor-ruthenate
      Potassium Ruthenium Nitrite
      Sodium Ruthenium Nitrite
      Ruthenium Dicarbonyl
      Potassium Ruthenocyanide
      Barium Ruthenocyanide
      Strontium Ruthenocyanide
      Ruthenium Silicide
    PDB 1bex-4e7y

Potassium Nitrosochloivifuthenate K2RuCl5NO






Potassium Nitrosochloivifuthenate or Potassium Ruthenium Nitrosochloride, 2KCl.RuCl3.NO or K2RuCl5NO, is obtained by direct precipitation of concentrated solutions of potassium chloride and ruthenium nitrosochloride ; it also results on evaporation of mixed dilute solutions of the two substances. It yields black orthorhombic crystals which dissolve in water to a reddish violet solution. The aqueous solution is stable, its electric conductivity showing no alteration whatever after standing for two weeks. Its solution apparently contains three ions, namely, К•, К•, and RuCl5.NO''.

This salt is interesting as being the one which led Claus in 1845 to identify ruthenium as a new element. He believed it to be K2RuCl3, analogous to potassium chlorplatinate, but Joly showed it to be a nitroso compound. The dihydrate, 2KCl.RuCl3.NO.2H2O, is deposited as black, efflorescent crystals when the mother-liquors of the salt are slowly concentrated.

The corresponding bromine and iodine derivatives, namely, 2KBr.RuBr3.NO and 2KI.RuI3.NO respectively, have been prepared.
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