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Fasnon/sandbox4

__ Na+      __ Au3+      __ Cl
Names
IUPAC name
Sodium tetrachloroaurate (III)
Other names
Sodium gold chloride, yellow gold chloride
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/Au.4ClH.Na/h;4*1H;/q+3;;;;;+1/p-4
  • [Na+].Cl[Au-](Cl)(Cl)Cl
Properties
NaAuCl4
Molar mass 361.756 g/mol
Appearance Orange golden solid
Density 0.8g/ml (20°C)[2]
139g/ml (10°C) 151g/ml (20°C) 900g/ml (60°C)[3]
Solubility Sparingly soluble in diethyl ether [4]
Hazards
GHS labelling:
GHS07: Exclamation mark
Warning
H315, H319, H335
P261, P264, P271, P280, P302+P352, P304+P340, P305+P351+P338, P312, P332+P313, P337+P313, P362+P364, P403+P233, P405, P501[5]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Tracking categories (test):


Gold 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 anhyrous and dihydrate forms are available commercially. [6]

Preparation

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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.[7] [4]

However, more efficient preparation methods have been discovered recently. These are the addition of gold with sodium oxy-halogen salts and hydrochloric acid.[7]

Uses

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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. [4]

References

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  1. ^ PubChem. "Sodium tetrachloroaurate". pubchem.ncbi.nlm.nih.gov. Retrieved 2019-05-19.
  2. ^ "13874-02-7 - Sodium tetrachloroaurate(III) dihydrate, Premion®, 99.99% (metals basis), Au 49-50% - Sodium chloroaurate(III) - Gold sodium chloride - 12148 - Alfa Aesar". www.alfa.com. Retrieved 2019-05-19.
  3. ^ Perry, Dale L. (2011). Handbook of Inorganic Compounds. CRC Press; 2 edition (May 18, 2011). p. 380. ISBN 9781439814611.
  4. ^ a b c Westcott, Stephen A. (2001), "Sodium Tetrachloroaurate(III)", Encyclopedia of Reagents for Organic Synthesis, American Cancer Society, doi:10.1002/047084289x.rs108, ISBN 9780470842898, retrieved 2019-05-20
  5. ^ "Sodium Tetrachloroaurate". www.espimetals.com. Retrieved 2019-05-20.
  6. ^ PubChem. "Sodium tetrachloroaurate". pubchem.ncbi.nlm.nih.gov. Retrieved 2019-05-19.
  7. ^ a b 20180208476, LU, Lin; Wang, Chen-hsiang & Fan, Kuei-sheng et al., "Method of Making Inorganic Gold Compound", issued 2018-07-26