Gold(I) sulfide
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| Names | |
|---|---|
| IUPAC name
Gold(I) sulfide
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| Other names
Aurous sulfide
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| Identifiers | |
| ECHA InfoCard | 100.013.749 |
CompTox Dashboard (EPA)
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| Properties | |
| Au2S | |
| Molar mass | 425.998 g/mol |
| Insoluble | |
| Related compounds | |
Other anions
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Copper(I) sulfide |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Gold(I) sulfide is the inorganic compound with the formula Au2S. It is one of two principal sulfides of gold, the other being Au2S3. Both materials are unstable with respect to the elements.
Structure and preparation
The compound crystallizes in the motif seen for cuprous oxide: gold is 2-coordinate, sulfur 4-coordinate, and the S-Au-S linkage is linear.[1] Linear coordination geometry is typically adopted by gold(I) compounds, such as the coordination complex chloro(dimethyl sulfide)gold(I).
It can be prepared by treating gold chloride with hydrogen sulfide[2] It also arises by treating dicyanoaurate:
This product is described as "initially dark reddish-brown" solid that turns "steel-gray".[3][4]
References
- ^ Wells, A.F. (1984) Structural Inorganic Chemistry, Oxford: Clarendon Press. ISBN 0-19-855370-6.
- ^ N. N. Greenwood, A. Earnshaw, Chemistry of the Elements, 2nd ed., Butterworth-Heinemann, Oxford, UK, 1997.
- ^ Faltens, Marjorie O. (1970). "Mössbauer Spectroscopy of Gold Compounds". The Journal of Chemical Physics. 53 (11): 4249. Bibcode:1970JChPh..53.4249F. doi:10.1063/1.1673931.
- ^ "Structure and Electrical Properties of Au2S". Solid State Ionics. 79: 60–66. 1970. doi:10.1016/0167-2738(95)00030-A.
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