Aurous oxide

Goldoiydul, n. aurous oxide, gold(I) oxide, -verbindung, /. aurous compoimd, gold(I) compound. 

If dilute chloraurie acid containing ammonium chloride is added to a cold saturated solution of ammonium chloride saturated with ammonia only one compound is obtained, namely, diamino-auric chloride, Au(NH2)2C1. This is a yellow powder which is non-explosive and is decomposed by washing with water, forming a derivative of aurous oxide of composition 3Au0.2NH3.,dH20, which is explosive. 

Aurous Derivatives of Nitrogen.—Aurous oxide and ammonia combine to form an explosive product,6 Au3N,NH3,4H20.6 When boiled with water, half of the nitrogen is eliminated, with formation of another nitride, Au3N,5H20. A highly explosive aurous hydrazoate has also been prepared.7 ... 

Nitride of Bivalent Gold.—Ammonia converts gold monoxide into a nitride containing gold and nitrogen in the atomic proportions 3 2, but different from the product formed by the interaction of ammonia and aurous oxide.11 The reaction is possibly expressed by the equation... 

Aurous oxide AU2O gold monoxide gold oxide. 

Gold Monoxide. Aurous oxide. Existence doubtful probably a mixture of gold and auric oxide Pollard, J. Chem. Soc. 129, 1347 (] 926). "Au.O has been prepared by treating KCAuBrj) with alkali. 

When the precipitate was treated with hydrochloric acid mere traces of gold went into solution, from which it may be concluded that an extremely small amount of aurous oxide could have been present. Because for other reasons higher oxides of gold could not have been present, it follows that the precipitate must have been metallic gold. 

Atoioioltv of gold, 174 AurioaiuiTdi 174 ohloridok 174 H iodide, 174 oid, 174 sulphide, 174 Aurous ohlorids, 174 iodi 174 oxide, 174 sulphide, 174 Compounds of gold, 174 Fotassioeotsie, 174 fltaiu, 34. 

The Ammines of Corps , Silver, and Gold—Ammino-derivatives of Cupric Sulphate—Hydroxylamine-derivatives of Cupric Sulphate—Cupro-ammino-sulphates—Ammino-salts of Cuprio Halides—Ammino-ouprous Halides— Ammino-derivatives of Silver Halides—Ammino-derivatives of Silver Nitrate —Ammino-derivatives of Gold Salts—Aurous Halides—Auric Halides— Derivatives of Auric Oxide, Auric Nitrate, Anrie Phosphate, Perohlorate— Derivatives of Mixed Salts. 

In 1819 Pelletier 2 found Au=288 by analysing aurous iodide. Two years later, Javal3 found Au=201 by analysing auric oxide, and Au=104 by analysing potassium aurichloride. In 1823 Figuier4 found Au = 179 from the analysis of sodium aurichloride. These very inaccurate results are in striking contrast to Berzelius s value. 

Aurous sulphide, Au2S.—The pure sulphide can be prepared7 by saturation of a solution of potassium aurocyanide with hydrogen sulphide, and precipitation of the salt by acidifying the solution with hydrochloric acid. It is not produced by the action of hydrogen sulphide on a hot solution of auric chloride, as supposed by Berzelius.8 The moist substance has- a steel-grey colour when dried, it becomes brownish black. When freshly prepared, the sulphide dissolves in water to a colloidal solution, from which it is reprecipitated by addition of hydrochloric acid. The sulphide is unaffected by dilute acids, but is decomposed by powerful oxidizers such as aqua regia and chlorine. It is readily dissolved by solutions of polysulphides,0 and less readily by those of monosulphides. It also dissolves in a solution of potassium... 

Potassium dichromate, KoCroOy Aurous chloride, AuCl Nitrous acid, HNOo Ammonium nitrite, NH4NO2 Sodium oxide, Na20 Peroxysulfate ion, SO- —... 

Oxidation numbers (I) and (III), as in AuCl, aurous chloride, and AU2O3, auric oxide. Most Au species, e.g., AuO or AuSe , are mixtures Au Au 2 or Au Au Sc2, etc. Liquid NH3 can yield Au in salt-like CsAu, stabilized by relativity. Relativity also makes metallic Au yellow. (Non-aqueous) F2 can produce [(Au F4)2(a-F)2]. 

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