Wikipedia

Gold(III) acetate

Gold(III) acetate, also known as auric acetate, is a chemical compound of gold and acetic acid. It is a yellow solid that decomposes at 170 °C to gold metal. This decomposition of gold(III) acetate has been studied as a pathway to produce gold nanoparticles as catalysts.[3]

Gold(III) acetate
Names
Other names
  • Auric acetate
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/3C2H4O2.Au/c3*1-2(3)4;/h3*1H3,(H,3,4);/q;;;+3/p-3
    Key: OTCKNHQTLOBDDD-UHFFFAOYSA-K
  • CC(=O)[O-].CC(=O)[O-].CC(=O)[O-].[Au+3]
Properties
Au(CH3COO)3
Molar mass 374.10 g/mol
Appearance Yellow solid
Melting point 170 °C (338 °F; 443 K)[2] (decomposes)
Slightly soluble
Solubility Slightly soluble in alkaline solutions[1]
Hazards
NFPA 704 (fire diamond)
NFPA 704 four-colored diamondHealth 0: Exposure under fire conditions would offer no hazard beyond that of ordinary combustible material. E.g. sodium chlorideFlammability 1: Must be pre-heated before ignition can occur. Flash point over 93 °C (200 °F). E.g. canola oilInstability 0: Normally stable, even under fire exposure conditions, and is not reactive with water. E.g. liquid nitrogenSpecial hazards (white): no code
0
1
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Production and reactions

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Gold(III) acetate can be produced by the reaction of gold(III) hydroxide and glacial acetic acid:[4]

Au(OH)3 + 3CH3COOH → Au(CH3COO)3 + 3H2O

It reacts with 2-(p-tolyl)pyridine (tpy) in presence of trifluoroacetic acid to form Au(CF3COO)2(tpy).[5]

Gold(III) sulfide has been claimed as the product when gold(III) acetate is sonicated with cyclo-octasulfur in decalin.[6]

References

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  1. ^ Hiroaki Sakurai; Kenji Koga; Yasuo Iizuka; Masato Kiuchi (2013). "Colorless alkaline solution of chloride-free gold acetate for impregnation: An innovative method for preparing highly active Au nanoparticles catalyst". Applied Catalysis A: General. 462: 236–246. doi:10.1016/j.apcata.2013.05.016.
  2. ^ S. Bakrania; G. Rathore; Margaret Wooldridge (2008). "An investigation of the thermal decomposition of gold acetate". Journal of Thermal Analysis and Calorimetry. 95 (1): 117–122. doi:10.1007/s10973-008-9173-1. S2CID 22343912.
  3. ^ H.-S. Oh; J.H. Yang; C.K. Costello; Y.M. Wang; S.R. Bare; H.H. Kung; M.C. Kung (2002). "Selective Catalytic Oxidation of CO: Effect of Chloride on Supported Au Catalysts". Journal of Catalysis. 210 (2): 375–386. doi:10.1006/jcat.2002.3710.
  4. ^ Metal Finishing. the University of Michigan: Metals and Plastics Publications. 1940. p. 104. Retrieved 11 May 2023.
  5. ^ Langseth, E.; Görbitz, C.H.; Heyn, R.H.; Tilset, M. (2012). "Versatile methods for preparation of new cyclometalated gold(III) complexes". Organometallics. 31 (18): 6567–6571. doi:10.1021/om300537a. hdl:10852/40504.
  6. ^ Kristl, M.; Drofenik, M. (2003). "Preparation of Au2S3 and nanocrystalline gold by sonochemical method". Inorganic Chemistry Communications. 6 (12): 1419–1422. doi:10.1016/j.inoche.2003.08.027.
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