Auric

It is dissolved by aqua regia (a mixture of concentrated hydrochloric and nitric acids). The product here is chlorauricil 11) acid, HAUCI4 in the complex chloraurate ion [AuClJ gold is in oxidation state + 3, auric gold. ... 

The alkaloids are strong bases, which turn red litmus blue, and are very slightly soluble m water. They form soluble salts and double salts wdth platmic and auric chlorides. The principal general reagents for the alkaloids are ... 

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. 

Goldoiyd, n. gold oxide, specif, auric oxide, gold (III) oxide, -ammoniak, n. fulminating gold, -salz, n. auric salt. gold(III) salt aurate. 

Gold-oxydverbindung, /. auric compoimd, gold(III) compound, -papier, n. gilt pap, gold paper. 

The range of isomer shifts is larger for aurous, Au(l), than for auric, Au(lll), compounds, most probably due to the larger amount of -character in sp than in dsp hybrid orbitals, and also to the smaller variety of ligands in the auric compounds under study. 

The quadrupole splittings of the aurous compounds are generally larger than those of the auric compounds. 

Fig. 7.78 Linear relation of the quadmpole splitting A q = ( jl)eqQ (1 + j /3)l/2 and the isomer shift b for aurous (a) and auric (b) compounds. Also included is a correlation with the relative change in electron density at the gold nucleus, Ali/r(o)P, as derived from Dirac-Fock atomic structure calculations for several electron configurations of gold. An approximate scale of the EFG (in the principal axes system) is given on the right-hand ordinate (from [341])...

Ishii T, Otsuka H, Kataoka K, Nagasaki Y (2004) Preparation of functionally Pegylated gold nanoparticles with narrow distribution through autoreduction of auric cation by alpha-biotinyl-PEG-block-[poly (2-(N, N-dimethylamino) ethyl methacrylate)]. Langmuir 20 561-564... 

Auric chloride Au + 2Cl AuCl. It is important to note that the Cl used here must be hot chlorine gas. 

When, for example, a weighed amount of metallic gold contained in a fused silica vessel was treated with excess of bromine trifluoiide, it dissolved rapidly. Excess of solvent, together with free bromine, were then evaporated in vacuum and a white solid remained which had the empirical formula AuBrFg. It was freely soluble in bromine trifluoride and enhanced the conductivity of the latter, so that it may reasonably be formulated as an acid (BrFjAuFJ in the bromine trifluoride solvent system. The compound lost bromine trifluoride when heated to 200° and gave auric fluoride AuFg. 

Reaction with potassium bromide yields potassium auric bromide and potassium chloride with separation of metalhc gold ... 

Formula AuCls MW 303.33 exists as a dimer, AU2CI6 in solid and vapor state forms a dihydrate, AuCls 2H2O Synonyms gold trichloride auric chloride. 

Formula Au(OH)3 MW 247.99 Synonyms gold trihydroxide auric hydroxide. 

Gold(lll) hydroxide is precipitated by mixing aqueous solutions of potassium auric chloride and sodium carbonate ... 

The product usually contains about three molecules of water of crystallization. It may alternatively be prepared by adding caustic soda solution to sodium auric cyanide ... 

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