Caesium auride
| Identifiers | |
|---|---|
3D model (JSmol)
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| Properties | |
| AuCs | |
| Molar mass | 329.872022 g·mol−1 |
| Appearance | Yellow crystals |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Caesium auride (CsAu) is an ionic compound containing the unusual Au− ion. It is obtained by heating a stoichiometric mixture of cesium and gold; the two metallic-yellow liquids react to give a clear product. The solution in liquid ammonia is brown, and the solid is yellow; the ammonium adduct is dark blue.
The compound reacts violently with water, yielding caesium hydroxide and metallic gold; in liquid ammonia it can be reacted with a cesium-specific ion exchange resin to produce tetramethylammonium auride.[1]
References
- ^ Jansen, Martin (2005-11-30). "Effects of relativistic motion of electrons on the chemistry of gold and platinum". Solid State Sciences. 7 (12): 1464–1474. doi:10.1016/j.solidstatesciences.2005.06.015.
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