Thiosulfato complexes

Oxidative leaching with ammonium thiosulfate (Section 9.17.3.1) generates solutions containing a mixture of the mono- and di-thiosulfato complexes, [Au(S203)] and [Au(S203)2]3> Gold can... 

Since a large excess of TS is often aaded to tne solution unaer typical experimental conditions,425 Cd2+ exist mostly as thiosulfato complexes. Reductive decomposition of this soluble species should therefore be more suitable to describe the electrode process responsible tc the CdS film growth. 

An unusual tetrahedral osmyl thiosulfato complex, [Os(0)2 (S203)2]2 , was recently prepared by reaction of Os04 in water with Na2S203. The X-ray crystal structure revealed a cis-dioxo structure with 0=0s=0 angle and Os=0 distances of 127.2(2)° and 1.692(3) A, respectively (256). In CH2C12, a reversible Os(VI/V) couple at - 1.10 V vs Cp2Fe+/0 and an irreversible oxidative wave were observed. 

In 1951 Riy and Sarma devised a method for obtaining the dicyanobis-(ethylenediamine) complex starting from bis(ethylenediamine)bis(thiosulfato) complexes ... 

Seawater and some freshwater contain Cu complexes as CuOH Cu(OH)2, Q1CO3, CuHCOs Cu(C03)2 , CUSO4, CuCl, [CuCy, and CuCr. Natural brines may contain [CuCft]. Hot namral waters may contain [CuCU] ". Some other natural waters may contain Cu(NH3) or HmCu°S " and polysulfido and thiosulfato complexes. 

Water. Aqueous Cd is very acidic [Cd(H20)6] forming Cd20rf and [Cd0H(H20)s] The carbonate, cyanide, oxalate, phosphate, sulfide and hexa-cyanoferrates(n and III) are insoluble, the fluoride shghtly soluble. The chloride and bromide are deliquescent the iodide is not, but all three dissolve in water or ethanol. Some natural waters may contain potysuUldo and thiosulfato complexes aswellasH CdS < - >-... 

Other natural waters may contain Pb(C03)2, Pb(HC03)2, Pb(HC03)3 Pb2(C03)2d, and polysulfido and thiosulfato complexes. Some... 

On the basis of IR results it has been claimed that the thiosulfate group may also act as a bidentate ligand bonding through both the terminal S atom and an O atom. One such case was (NH4)2Ag2(I)2(S203) (27).245 Characteristic absorption bands for thiosulfato silver(I) complexes are given in Table 34. 

Table 34 Characteristic Absorption Bands (cm-1) for Thiosulfato Silver(I) Complexes...

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