Tellurides hydrogen

Liquid, decomposed immediately by light. Dry gas is stable to light but decomposes in presence of dust, moisture, rubber, cork, etc.1,2 Soluble in water decomposes in alcohol.2 

Nitric Acid. Cold fuming nitric acid ignites hydrogen telluride, sometimes explosively.3 

Highly toxic.4 Irritating to the eyes and mucous membranes. Imparts offensive odor to breath. Causes dizziness and nausea.1 

Pascal, P., Ed., Nouveau Traite de Chimie Minerale, Masson, Paris, 1956, pp. 10, 505. 

Dissolves in hot water low solubility in cold water soluble in dilute alkali, dimethylsulfoxide, acetone, and other organic solvents unstable to oxygen.1 

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Hydrogen selenide (selenium hydride), HjSe, and hydrogen telluride (tellurium hydride), HjTe... 

Hydrogen Telluride. Hydrogen teUuride, H2Te, is a colorless, toxic gas having an odor resembling that of arsine. It is also colorless in the... 

Tellur-verbindung, /. tellurium compound, -vorlegierung,/. tellurium prealloy, -wasser-stoff, m. hydrogen telluride. -wasserstoff-sSure, /. hydrotelluric acid (hydrogen telluride). -wismut, n. bismuth telluride. 

H2Te (hydrogen telluride, colorless), HTe (hydrogen telluride ion, colorless), Te (telluride ion, colorless), Te (ditelluride ion, red), Te" + (tellurous ion), HTeOj (telluryl ion), HTeO (acid tellurite ion, colorless), TeO " (tellurite ion, colorless), H2Te04 (telluric acid, colorless), HTeOJ (acid tellurate ion, colorless), TeO (tellurate ion, colorless). 

Sodium hydrogen telluride, (NaTeH), prepared in situ from the reaction of tellurium powder with an aqueous ethanol solution of sodium borohydride, is an effective reducing reagent for many functionalities, such as azide, sulfoxide, disulfide, activated C=C bonds, nitroxide, and so forth. Water is a convenient solvent for these transformations.28 A variety of functional groups including aldehydes, ketones, olefins, nitroxides, and azides are also reduced by sodium hypophosphite buffer solution.29... 

When the conditions are controlled properly, Zn can mediate the reduction of the C-C double bond of a, (3-unsaturated carbonyl compounds in the presence of a nickel catalyst in aqueous ammonium chloride (Eq. 10.7). The use of ultrasonication enhances the rate of the reaction.15 Sodium hydrogen telluride, (NaTeH), prepared in situ from the reaction of... 

Hexaazido-2,4,6-triaza-1,3,5-triphosphorine, 4795 Hydrogen azide, 4441 f Hydrogen selenide, 4486 f Hydrogen telluride, 4488 Iodoform, 0376 Lead(II) azide, 4782 Lead(IV) azide, 4790 Mercury(II) cyanide, 0976 Mercury(II) fulminate, 0978... 

With Teflarfum.—When tellurium is heated to 400° C. in hydrogen, the elements combine, forming hydrogen telluride —... 

Hydrogen telluride is prepared in situ by hydrolysis of aluminium telluride. 

Sodium hydrogen telluride is prepared by reduction of tellurium with NaBH4 under several conditions. The original procedure uses ethanol as the solvent, adding, after complete reduction of the tellurium, an appropriate amount of acetic acid (see Section 4.1.2, ref. 10 Section 4.1.7, ref. 29). 

The title reagent (prepared by the reaction of sodium hydrogen telluride with chlorotriph-enylstannane) reacts easily with the more active halides such as benzyl bromides whereas common halides need to be activated by cesium fluoride. 

Organyl tellurols are very unstable compounds owing to their extreme sensitivity to oxygen, giving the corresponding ditellurides. The first short-chain alkyltellurols (C1-C4) have been isolated as yellow liquids with an obnoxious odour, from the reaction of aluminium telluride and hydrogen telluride, respectively, with alcohols and aUcyl bromides. Aryltellurols seem not to have been isolated. As shown in Sections 3.1.3.2 and 3.2.2, aryl tellurolates are... 

Hydrogen telluride, H2Te, generated in situ by the hydrolysis of aluminium telluride, reduces aldehydes and ketones to the corresponding alcohols. In the presence of deuterium oxide, deuterated derivatives are formed. 

The regioselective reduction of the C=C bond of a, -unsaturated carbonyl compounds, a very important organic reaction, is achieved by means of hydrogen telluride and phenyl tellurol, under appropriate experimental conditions. 

In addition to the described reduction of double bonds conjugated to a carbonyl group, sodium hydrogen telluride and phenyltellurol reduce double (and triple) bonds conjugated to aromatic systems. " ... 

Hydrogen telluride, sodium hydrogen telluride as well as phenyltelluroP afford the reduction of imines to secondary amines. 

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