Gold(III) sulfide or auric sulfide is an
inorganic compound
In chemistry, an inorganic compound is typically a chemical compound that lacks carbon–hydrogen bonds, that is, a compound that is not an organic compound. The study of inorganic compounds is a subfield of chemistry known as '' inorganic chemist ...
with the formula .Auric sulfide has been described as a black and amorphous.
Little evidence has been published supporting the existence of macroscopic quantities of this material.
Claims
Early investigations claimed to prepare auric sulfide by the reaction of
lithium tetrachloroaurate with hydrogen sulfide:
:
Similar preparations via
chloroauric acid,
auric chloride
Gold(III) chloride, traditionally called auric chloride, is a inorganic compound, compound of gold and chlorine with the molecular formula . The "III" in the name indicates that the gold has an oxidation state of +3, typical for many gold comp ...
, or
gold(III) sulfate
Gold is a chemical element with the symbol Au (from la, aurum) and atomic number 79. This makes it one of the higher atomic number elements that occur naturally. It is a bright, slightly orange-yellow, dense, soft, malleable, and ductile me ...
a claimed proceed in anhydrous solvents, but water evinces a
redox decomposition into
metallic gold in
sulfuric acid
Sulfuric acid (American spelling and the preferred IUPAC name) or sulphuric acid ( Commonwealth spelling), known in antiquity as oil of vitriol, is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with the molecular formu ...
:
:
Conversely,
''cyclo''-octasulfur reduces gold(III) sulfate to a mixture of gold sulfides and sulfur oxides:
:
Auric sulfide has also been claimed as the product when
auric acetate is sonicated with ''cyclo''-octasulfur in
decalin.
Auric sulfide is claimed to react with
nitric acid as well
sodium cyanide. It is claimed to dissolve in concentrated
sodium sulfide
Sodium sulfide is a chemical compound with the formula Na2 S, or more commonly its hydrate Na2S·9 H2O. Both the anhydrous and the hydrated salts in pure crystalline form are colorless solids, although technical grades of sodium sulfide are gener ...
solution.
See also
*
Gold(I) sulfide
References
{{Sulfides
Gold(III) compounds
Sulfides
Hypothetical chemical compounds