Sulfate tellurides

DTGS = deuterated triglycine sulfate KRS — 5 = mixed thallium bromide-iodide LT = lithium tantalate MCT = mercury cadmium telluride and OPO = optical parametric oscillator. 

Selenic acid, H2Se04, is a strong acid (/fai 2) and the solubility of its salts parallels that of the corresponding sulfates. It is formed by the oxidation of selenous acid or elemental selenium with strong oxidizing agents in the presence of water. Telluric acid, H2Te04, or tellurates are obtained by oxidation of tellurides,... 

Silver strikes, 9 823 Silver sulfadiazine, 22 637 clinical use of, 22 679 Silver sulfate, 22 673 as catalyst, 22 685 in electrolytic coloring, 22 686 Silver sulfide, 22 673-674 for batteries, 22 684 natural occurrence of, 22 668 Silver sulfite, 22 674 Silver sulfonantimonite, natural occurrence of, 22 668 Silver telluride, natural occurrence of, 22 668... 

Sulfation Roasting. Acid roasting technology (Fig. 2) relies on differences in the volatility of the tetravalent oxides of selenium and tellurium at roasting temperatures of 500—600°C to selectively volatilize selenium from slimes. Acid roasting uses sulfuric acid as the oxidant for the conversion of selenium/selenides and tellurium/tellurides to their respective tetravalent oxides. Typical oxidation reactions are as follow ... 

These compounds have only been studied on the trace scale. An ether soluble polonium dibenzyl is reported (80, 118) to be formed by the action of dimethylphenylbenzy 1-ammonium chloride on sodium polonide/telluride mixtures in water saturated with hydrogen. The dimethyl was prepared in the same way, but with dimethyl sulfate (118) and may also be formed in... 

Zinc sulfate has been used as a mordant in calico printing for preserving wood and skins for the manufacture of other zinc salts for clarifying glue and in electrodeposition processes. The sulfide is used as a pigment and as a source of other pigments ZnS is used in X-ray and television screens and, with a trace of a radium or mesothorium salt, in luminous dials of watches. The telluride has been used as a photoconducting semiconductor. 

Silver is a rare element, which occurs naturally in its pure form as a white, ductile metal, and in ores. It has an average abundance of about 0.1 ppm in the earth s crust and about 0.3 ppm in soils. There are four oxidation states (0, 1 +, 2+, and 3+) the 0 and 1 + forms are much more common than the 2+ and 3+ forms. Silver occurs primarily as sulfides, in association with iron (pyrite), lead (galena), and tellurides, and with gold. Silver is found in surface waters in various forms (1) as the monovalent ion (e.g., sulphide, bicarbonate, or sulfate salts) (2) as part of more complex ions with chlorides and sulfates and (3) adsorbed onto particulate matter. 

Diethylhydrogallium, see Diethylgallium hydride, 1715 Diethylhydroxytin hydroperoxide, 1757 Diethyllead dinitrate, 1686 Diethylmagnesium, 1681 Diethylmethylphosphine, 2030 Diethyl 4-nitrophenyl phosphate, 3323 Diethyl 4-nitrophenyl thionophosphate, 3322 t 3,3-Diethylpentane, 3193 Diethyl peroxide, 1693 Diethyl peroxydicarbonate, 2440 Diethylphosphine, 1728 N- (D i ethylphosphinoy 1) h yd ro x y I a m i n e, 1746 Diethyl phosphite, 1727 Diethyl succinate, 3026 Diethyl sulfate, 1704 Diethyl sulfite, 1703 Diethyl telluride, 1711 Diethylthallium perchlorate, 1676 Diethyl trifluoroacetosuccinate, 3314 Diethylzinc, 1712... 

Treatment of 1,3,2-dioxathiolane. 7,.7-dioxides with telluride ion, generated in situ by reduction of the elemental Te, yields alkenes rapidly (10min-2h) under mild conditions (0°C to rt) <1995TL7209>. The reduction may be performed with 0.1 equiv or less of Te in the presence of a stoichiometric amount of LiEt3BH or NaH. The reaction is stereospecific, for example, / >-2,3-diphenylethane-2,3-diol produces ar-stilbene, and d,l-2,3-diphenylethane-2,3-diol gives trans-stilbene. The sulfates of m-diols are readily converted to ar-alkenes, as shown in Equation (12) <1995TL7209>. 

The D-tf//o-inositol-based cyclic sulfate 53 has been reduced with sodium hydrogen telluride to the protected conduritol (Equation 13) <2000EJ01285>. 

Bis[l-naphthyl] Ditellurium2 To a stirred solution of 0.15 mol of naphthyl lithium in 200 ml of anhydrous diethyl ether under an inert atmosphere are added in small portions 18 g (0.14 mol) of commercial tellurium powder. After completion of the addition, the mixture is stirred and heated under reflux for 30 min and then poured into aqueous 6 molar hydrochloric acid containing ice. This operation must be performed in a well-ventilated hood to avoid exposure to hydrogen telluride. Air is then bubbled through the filtered mixture which is subsequently extracted several times with diethyl ether. The extracts arc dried with magnesium sulfate and evaporated. The residue is recrystallized from petroleum ether (b.p. 20-40°) yield 66% m.p. 119- 122°. Similarly prepared were the following diaryl ditellurium compounds ... 

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