Thallium chloride complexed

Porphyrin, octaethyl-, thallium chloride complex cyclic voltammetry, 4, 399 <73JA5140)... 

It was also possible to explain the known fact that the indium chloride complex is purely extracted in comparison with the gallium and thallium chloride complexes. 

Tri-n-butyl phosphate, ( -C4H9)3P04. This solvent is useful for the extraction of metal thiocyanate complexes, of nitrates from nitric acid solution (e.g. cerium, thallium, and uranium), of chloride complexes, and of acetic acid from aqueous solution. In the analysis of steel, iron(III) may be removed as the soluble iron(III) thiocyanate . The solvent is non-volatile, non-flammable, and rapid in its action. 

Extraction of the chloride complex of thallium(III) from HCl media is less selective [4-6]. For diethyl ether and DIPE, the most suitable media are 4 M HCl and 6 M HCl, respectively. Au(III), Fe(III), Sb(V), Sn, Hg, Mo, As, Ge, and Ga are partly extracted along with the thallium(III) from an HCl medium. Extraction of Tl(lII) from less concentrated HCl media by using CHCI3 solutions of n-octylaniline has been proposed [7]. 

The most substantial investigation of thallium(II) species in aqueous solution is that of Dodson and Schwarz, who studied equilibria and kinetics of Tl(II)-Cr complexes (77). On the basis of some (reasonable) assumptions, they have calculated the stepwise stability constants K for the three T1C1 " complexes, n = 1,2,3, in 1M HCIO4 and estimated = 1 from the ratios between the stability constants K, for Tfi Cl " and TT C1 ". The absorption spectra of the individual Tl(II) chloride complexes have been derived from their stability constants in combination with the experimental spectra recorded for solutions with varying composition. Absorption maxima were found at 263 and 342 nm for TlCl, at 280 and 342 nm for TICI2, and at 304 and 362 nm for TlCla". An interesting observation was the 10-fold increase of the extinction coefficient (at —340 nm) of the Tl(II) solution in 1 M perchloric acid upon addition of a small amount of chloride ion ([Cl ] = 10 M) (77). 

Calculated and Experimental Stability Constants for Thallium(III) Chloride Complexes in Aqueous Solution at 25°C (in Molar Units)"... 

The first extensive study of ligand exchange on thallium(III) complexes comprised mutual chloride exchange between the various T1C1 " (n = 1-4) complexes, as well as between the thallium chloro complexes and the free chloride ion in aqueous solution containing... 

For the direct exchange between the thallium complexes, Eq. (9), the dissociatively activated reaction mechanism previously proposed for the thallium chloride system (169) could now be confirmed and... 

Relatively little work has been done on the redox reaction between thallium and halide/pseudohalide ions (75, 93, 97,110, 328-330). Let us consider the qualitative order of stability of thallium(III) in the form of TlXp " complexes, where X = Cl, Br, I, SCN, CN, Thallium(III) forms strong complexes with all these ligands on the other hand, it can oxidize the X ions to X2. It is well known that the thallium(III) chloride complexes are perfectly stable for an indefinite period of time. The corresponding bromide complexes are usually stable, but at low Br/Tl ratios Tl(III) can be reduced by Br the reduction is easily prevented by adding excess of bromine. The iodo and thiocyanato complexes are approximately equally unstable toward redox reaction Tl(III) is rapidly reduced by the anion.Finally, the cyano complexes... 

Thallium(Il) complexes, 171 Thallium(III) complexes, 171 amines, 172 ammines, 172 aqua, 172 bipyridyl, 172 bromates, 173 bromides, 174 carboxylates, 173 chlorates, 173 chlorides, 174 cyanides, 171 dichlorophosphates, 173 ethers, 173... 

This survey summarizes the methods adopted in this laboratory for the study of the hydrolysis of the chloride complexes of the thallium(lll), iron(llI) and zinc(II) ions. The works discussed here represent a part of a general program initiated with the purpose to investigate the influence of chloride complex formation on hydrolysis. We hope that a systematic study of the chloride complexes will provide a basis for finding quantitative correlations between the hydrolysis mechanism and the ionic charge, size and structure. 

In the case of thallium(III) the quadrupolar relaxation in the predominant chloride complex determines the line width over the whole temperature range studied and only lower limits of the exchange rate could be obtained ... 

Thallium(ii) has been generated in the pulse radiolysis of TF and in IM-HC104. The rates of the reaction of TF + OH and TF + H have been measured, and from data on the Fe TF reaction, the free energy of formation of TF has been shown to be 42 kcal mol. TF plays no part in the TF-TF exchange. Three chloride complexes of TF have also been characterized by radiolytic techniques. Absorption spectra for TICF, TICI2, and TlCls" have been reported. In the complex formation reaction... 

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