Gold(III) oxide

Summary

Gold(III) oxide
Au2O3structure.jpg
Names
IUPAC name
Gold(III) oxide
Other names
Gold trioxide, Gold sesquioxide, Auric oxide
Identifiers
  • 1303-58-8 checkY
3D model (JSmol)
  • Interactive image
ECHA InfoCard 100.013.748 Edit this at Wikidata
  • 164805
UNII
  • LW5Y686RUP checkY
  • DTXSID20926672 Edit this at Wikidata
  • InChI=1S/2Au.3O/q2*+3;3*-2
    Key: DDYSHSNGZNCTKB-UHFFFAOYSA-N
  • [O-2].[O-2].[O-2].[Au+3].[Au+3]
Properties
Au2O3
Molar mass 441.93
Appearance red-brown solid
Density 11.34 g/cm3 at 20 °C[1]
Melting point 160 °C (320 °F; 433 K)
insoluble in water, soluble in hydrochloric and nitric acid
Structure
Orthorombic, oF40
Fdd2, No. 43[1]
Hazards
NFPA 704 (fire diamond)
1
0
0
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Gold(III) oxide (Au2O3) is an inorganic compound of gold and oxygen with the formula Au2O3. It is a red-brown solid that decomposes at 160 °C.[2]

According to X-ray crystallography, Au2O3 features square planar gold centers with both 2- and 3-coordinated oxides. The four Au-O bond distances range from 193 to 207 picometers.[1] It can be prepared by heating amorphous hydrated gold(III) oxide with perchloric acid and an alkali metal perchlorate in a sealed quartz tube at a temperature of around 250 °C and a pressure of around 30 MPa.[3]

References

  1. ^ a b c Jones, P. G.; Rumpel, H.; Schwarzmann, E.; Sheldrick, G. M.; Paulus, H. (1979). "Gold(III) oxide". Acta Crystallographica Section B. 35 (6): 1435. doi:10.1107/S0567740879006622.
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
  3. ^ Jones, Peter G.; Rumpel, Horst; Sheldrick, George M.; Schwarzmann, Einhard (1980). "Gold(III) oxide and oxychloride" (open access). Gold Bulletin. 13 (2): 56. doi:10.1007/BF03215453.

External links

  • Media related to Gold(III) oxide at Wikimedia Commons