Gold -iodide

Gold-hydroxyd, n. gold hydroxide, specif, auric hydroxide, gold(III) hydroxide, -jodid, n. gold iodide, specif, auric iodide, gold(III) iodide, -jodiir, n. aurous iodide, gold (I) iodide, -kafer, m. gold beetle. 

C2H2O3 298-12-4) see Allantoin Ethyl biscoumacetate Lamivudine Orotic acid gold iodide (Aul)... 

Major constituents (greater than 5 mg/L) Minor constituents (O.Ol-lO.Omg/L) Selected trace constituents (less than 0.1 mg/L) Bicarbonate, calcium, carbonic acid, chloride, magnesium, silicon, sodium, sulfate Boron, carbonate, fluoride, iron, nitrate, potassium, strontium Aluminum, arsenic, barium, bromide, cadmium, chromium, cobalt, copper, gold, iodide, lead, Uthium, manganese, molybdenum, nickel, phosphate, radium, selenium, silver, tin, titanium, uranium, vanadium, zinc, zirconium... 

Cellulose acetate membrane [69] and cellulose fiber [70] were coated on PPy to remove gold iodide and Cr(VI), respectively. Ionic exchange was ascribe for the gold iodide removal and the reduction of Cr(VI) to Cr(III), followed by adsorption. A covalently immobilized heparin-PPy/ poly(ethylene glycol) methacrylate composite was also fabricated for biological applications to reduce the protein and thrombus formation [71]. 

M. M. Castillo-Ortega, 1. Santos-Sauceda, J. C. Encinas, D. E. Rodriguez-Felix, T. del Castillo-Castro, E Rodriguez-Felix, J. L. Valenzuela-Garcia, L. S. Quiroz-Castillo, R J. Herrera-Franco, Adsorption and desorption of a gold-iodide complex onto cellulose acetate membrane coated with polyaniline or polypyrrole A comparative study. /Mater Sci 2011,46 (23), 7466-7474. 

The chemistry of the bromides is completely analogous to that of the chlorides. Gold(III) iodide [31032-13-0] on the other hand, is unstable, loses iodine, and converts to Aul [10294-31-2] (176). 

Rubidium metal alloys with the other alkaU metals, the alkaline-earth metals, antimony, bismuth, gold, and mercury. Rubidium forms double haUde salts with antimony, bismuth, cadmium, cobalt, copper, iron, lead, manganese, mercury, nickel, thorium, and 2iac. These complexes are generally water iasoluble and not hygroscopic. The soluble mbidium compounds are acetate, bromide, carbonate, chloride, chromate, fluoride, formate, hydroxide, iodide. 

Gold (I) iodide [10294-31-2] M 323.9, m 120°(dec), d 8.25. It has been prepared by heating gold and iodine in a tube at 120° for 4 months. Since it decomposes to Au and I2 in the presence of UV light and heat then the main impurity is Au. The salt is therefore purified by heating at 120° with I2 for several weeks. The crystals should be kept dry and in a cool place in the dark. [Z Naturforsch IIB 604 7956.]... 

Anhalojiidine, C Hi OgN, crystallises in small octahedra, m.p. 160-1°. The hydrochloride, B. HCl, forms prisms, but the platinum and gold salts are amorphous the picrate has m.p. 201-8°. The alkaloid contains two methoxyl groups, yields a monobenzoyl derivative, m.p. 189° and with methyl iodide forms A-methylanhalonidine hydriodide (pellotine hydi-iodide), yellow prisms, m.p. 125-130°. 

They form a monolayer that is rich in defects, but no second monolayer is observed. The interpretation of these results is not straightforward from a chemical point of view both the electrodeposition of low-valent Ge Iy species and the formation of Au-Ge or even Au Ge h compounds are possible. A similar result is obtained if the electrodeposition is performed from GeGl4. There, 250 20 pm high islands are also observed on the electrode surface. They can be oxidized reversibly and disappear completely from the surface. With Gel4 the oxidation is more complicated, because the electrode potential for the gold step oxidation is too close to that of the island electrodissolution, so that the two processes can hardly be distinguished. The gold step oxidation already occurs at -i-lO mV vs. the former open circuit potential, at h-485 mV the oxidation of iodide to iodine starts. 

Determination. To an aliquot of the silver(I) solution containing between 10 and 50 pg of silver, add sufficient EDTA to complex all those cations present which form an EDTA complex. If gold is present (>250 xg) it is masked by adding sufficient bromide ion to form the AuBr4 complex. Cyanide, thiocyanate or iodide ions are masked by adding sufficient mercury(II) ions to complex these anions followed by sufficient EDTA to complex any excess mercury(II). Add 1 mL of 20 per cent ammonium acetate solution, etc., and proceed as described under Calibration. 

The reaction is a sensitive one, but is subject to a number of interferences. The solution must be free from large amounts of lead, thallium (I), copper, tin, arsenic, antimony, gold, silver, platinum, and palladium, and from elements in sufficient quantity to colour the solution, e.g. nickel. Metals giving insoluble iodides must be absent, or present in amounts not yielding a precipitate. Substances which liberate iodine from potassium iodide interfere, for example iron(III) the latter should be reduced with sulphurous acid and the excess of gas boiled off, or by a 30 per cent solution of hypophosphorous acid. Chloride ion reduces the intensity of the bismuth colour. Separation of bismuth from copper can be effected by extraction of the bismuth as dithizonate by treatment in ammoniacal potassium cyanide solution with a 0.1 per cent solution of dithizone in chloroform if lead is present, shaking of the chloroform solution of lead and bismuth dithizonates with a buffer solution of pH 3.4 results in the lead alone passing into the aqueous phase. The bismuth complex is soluble in a pentan-l-ol-ethyl acetate mixture, and this fact can be utilised for the determination in the presence of coloured ions, such as nickel, cobalt, chromium, and uranium. 

Gold(III) iodide has not been definitely characterized in the solid state substances with this formula in the solid state are probably gold(I) polyiodides Au+If AuI3 has also been detected in the gas phase (mass spectra). 

Au(diphos)2 and Au(diars)2 can be oxidized to gold(III) species [127]. These tend to add halide ions so that Au(diars)2lJ has a distorted octahedral structure with very weakly bound iodides (section 4.12.5). 

Gold telluride iodide, AuTczI, was the first example of a gold chalco-genide halide, and was found in 1969 (305). Systematic investigations confirmed the existence of at least six compounds four telluride halides and two selenide halides (see Table IV). No sulfide halides have been reported. 

Abdou, H.E., Mohamed, A.A. and Fackler, J.P. Jr (2004) Oxidative addition of methyl iodide to dinuclear Gold(I) amidinate complex schmidbaur s breakthrough reaction revisited with amidinates. ZeitschriJiJurNaturforschungB. A Journal of Chemical Sciences, 59, 1480-1482. 

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