Английская Википедия:Caesium auride

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Шаблон:Chembox

Caesium auride is the inorganic compound with the formula CsAu. It is the Cs+ salt of the unusual Au anion.[1]

Preparation and reactions

CsAu is obtained by heating a stoichiometric mixture of caesium and gold. The two metallic-yellow liquids react to give a transparent yellow product.[2] Despite being a compound of two metals, CsAu lacks metallic properties since it is a salt with localized charges; it instead behaves as a semiconductor with band gap 2.6 eV.[3]

The compound hydrolyzes readily, yielding caesium hydroxide, metallic gold, and hydrogen.[2]

2 CsAu + 2 H2O → 2 CsOH + 2 Au + H2

The solution in liquid ammonia is brown, and the ammonia adduct Шаблон:Chem2 is blue; the latter has ammonia molecules intercalated between layers of the CsAu crystal parallel to the (110) plane. Solutions undergo metathesis with tetramethylammonium loaded ion exchange resin to give tetramethylammonium auride.[2]

References

Шаблон:Reflist

Further reading

Шаблон:Gold compounds Шаблон:Caesium compounds