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Sodium tetrachloroaurate

Sodium tetrachloroaurate is an inorganic compound with the chemical formula NaAuCl4. It is composed of the ions Na+ and AuCl4−. It exists in the anhydrous and dihydrate states. At room temperature, it exists as a golden-orange solid. The anhydrous and dihydrate forms are available commercially.

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Preparation

The conventional method of preparation of sodium tetrachloroaurate involves the addition of tetrachloroauric acid solution to sodium chloride or sodium carbonate to form a mixture. The mixture is stirred at 100 °C, and then subjected to evaporation, cooling, crystallization, and drying to obtain the orange crystals of sodium tetrachloroaurate.

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However, more efficient preparation methods have been discovered recently. These are the addition of gold with sodium oxy-halogen salts and hydrochloric acid.

Uses

It is used in a wide range of applications. For example, it is used as a catalyst for the hydrochlorination of acetylene, or the oxidation of sulfides.

References

References

  1. PubChem. "Sodium tetrachloroaurate".
  2. (1988-07-15). "Anhydrous sodium tetrachloroaurate(III)". International Union of Crystallography (IUCr).
  3. Perry, Dale L.. (2011). "Handbook of Inorganic Compounds". CRC Press; 2 edition (May 18, 2011).
  4. Westcott, Stephen A.. (2001). "Encyclopedia of Reagents for Organic Synthesis". American Cancer Society.
  5. "Sodium Tetrachloroaurate".
  6. "Method of making inorganic gold compound".
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gold(iii)-compounds inorganic-compounds chlorometallates aurates gold–halogen-compounds
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