Gold Chloride

	Gold Chloride Gold chloride can refer to: * Gold(I) chloride (gold monochloride), AuCl * Gold(I,III) chloride (gold dichloride, tetragold octachloride), Au4Cl8 * Gold(III) chloride (gold trichloride, digold hexachloride), Au2Cl6 * Chloroauric acid Chloroauric acid is an inorganic compound with the chemical formula . It forms hydrates . Both the trihydrate and tetrahydrate are known. Both are orange-yellow solids consisting of the planar anion. Often chloroauric acid is handled as a soluti ..., HAuCl4 (brown gold chloride); or its sodium salt, NaAuCl4 (gold chloride, sodium gold chloride, yellow gold chloride), used as a histological stain {{Chemistry index ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gold(I) Chloride Gold(I) chloride is a compound of gold and chlorine with the chemical formula AuCl. Preparation Gold(I) chloride is prepared by thermal decomposition of gold(III) chloride. Reactions Although there is a region of stability at higher temperatures at the appropriate chlorine vapor pressures, the compound is metastable at ambient conditions. When heated with water, the compound disporpotionates to metallic gold and gold(III) chloride in an autoredox reaction: : 3 AuCl → 2 Au + AuCl3 At still higher temperatures, around 500 °C, all gold chlorides convert to gold. This conversion is key to the Miller process, which is widely used for the purification of gold. Reaction with potassium bromide yields potassium auric bromide and potassium chloride Potassium chloride (KCl, or potassium salt) is a metal halide salt composed of potassium and chlorine. It is odorless and has a white or colorless vitreous crystal appearance. The solid dissolves readily in water, and its solutions ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gold(I,III) Chloride Gold(I,III) chloride is a black solid with the chemical formula Au4 Cl8. It is an example of a mixed valence compound as it contains gold in two different oxidation states; square-planar gold(III) and almost linear gold(I). The compound is photosensitive as well as air- and moisture-sensitive. Synthesis Gold(I,III) chloride may be prepared by the reaction of gold(III) chloride with gold carbonyl chloride or carbon monoxide at room temperature in thionyl chloride. :Au2(CO)Cl4 + Au2Cl6 → COCl2 + Au4Cl8 :2 Au2Cl6 + 2 CO → Au4Cl8 + 2 COCl2 Structure and properties Single crystals of gold(I,III) chloride are triclinic with a P space group In mathematics, physics and chemistry, a space group is the symmetry group of an object in space, usually in three dimensions. The elements of a space group (its symmetry operations) are the rigid transformations of an object that leave it uncha ... and consist of discrete Au4Cl8 molecules with idealised C2h symmetry. Within this the Au(I ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Gold(III) Chloride Gold(III) chloride, traditionally called auric chloride, is a 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 compounds. Gold(III) chloride is hygroscopic and decomposes in visible light. This compound is a dimer of . This compound has few uses, although it catalyzes various organic reactions. Structure exists as a chloride-bridged dimer both as a solid and vapour, at least at low temperatures. Gold(III) bromide behaves analogously. The structure is similar to that of iodine(III) chloride. Each gold center is square planar in gold(III) chloride, which is typical of a metal complex with a d8 electron count. The bonding in is considered somewhat covalent. Preparation Gold(III) chloride is most often prepared by passing chlorine gas over gold powder at : : The chlorination reaction can be conducted in the presence of tetrabutylammonium chloride, the product bein ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]