Chemical elements
  Gold
    Isotopes
    Energy
    Production
    Extraction
    Application
    Physical Properties
    Chemical Properties
      Aurous fluoride
      Aurous chloride
      Aurous bromide
      Aurous iodide
      Aurous oxide
      Aurous sulphide
      Aurous thiosulphate
      Aurous Derivatives of Nitrogen
      Aurous cyanide
      Potassium aurothiocyanate
      Ammonia and Aurous Halides
      Gold dichloride
      Gold dibromide
      Gold monoxide
      Gold monosulphide
      Gold monosulphate
      Nitride of Bivalent Gold
      Auric chloride
      Aurichloric Acid
      Auric bromide
      Auribromic Acid
      Auric iodide
      Auri-iodic Acid
      Auric iodate
      Auric hydroxide
      Auric sulphide
      Auric sulphate
      Acid auryl sulphate
      Auric selenide
      Auric selenate
      Auric telluride
      Gold and Nitrogen
      Auric nitrates
      Gold and Phosphorus
      Gold arsenides
      Auric selenide
      Auric antimonide
      Auric cyanide
      Salts of Auricyanic Acid
      Double Salts of Auric thiocyanate
      Gold carbide
      Gold and Silicon
    PDB 1a52-4acl

Derivatives of Gold and Nitrogen






The so-called " fulminating gold" has long been known, and derives its name from its explosive character. Its composition varies with the mode of preparation. Explosive products classed as fulminating gold are obtained by the interaction of ammonia or ammonium salts and auric oxide; by that of ammonia or ammonium carbonate and auric-chloride solution; and by that of ammonia and the sulphuric-acid and nitric-acid derivatives of gold. The colour of the product varies between green and brownish yellow; and on heating, percussion, or rubbing it decomposes explosively into gold, nitrogen, and ammonia. The explosive power is augmented by boiling with water or potassium-hydroxide solution, and by careful heating at 100° C. It is reduced by mixing the powder with salts of the alkali-metals or alkaline-earth metals, and with metallic oxides. Raschig assigns to the product obtained from auric oxide the constitutional formula NH=Au-NH2, the union of both nitrogen atoms with gold being indicated by the small proportion of nitrogen eliminated by boiling with water, alkalies, or acids. He has shown the product obtained from auric chloride to consist of this substance with an admixture of a chloro-derivative, NH=Au-Cl.


Jacobsen method

Another method of preparation has been described by Jacobsen.

Silver nitrate reacts with aurichloric acid in accordance with the equation

4AgNO3+HAuCl4+3H2O = Au(OH)3,4AgCl + 4HNO3.

The brown precipitate formed is converted by ammonia into fulminating gold, which after drying explodes violently downwards when touched with a knife. Jacobsen regards it as having the constitution Au(OH)2NH2 or (AuN,2H2O),H2O. When boiled with potassium- hydroxide solution, it is converted into a blackish-brown substance of even more explosive character, probably having the constitution Au(OH)2NHAU(OH)2.
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