Alkali metal tellurides

However, simple stoichiometry often conceals structural complexity as in the many alkali metal tellurides MTe (jc = 1, 1.5, 2.5, 3,... 

All the dialkali monosulfides are soluble in water and give alkaline solutions. The tellurides are instantly decomposed by air. They are soluble in water, but the solutions are easily oxidized to red polytellurides. The alkali metal tellurides are strong reducing agents which reduce tellurites to metallic tellurium. 

Sheldrick WS, Wachhold M, Jobic S, Brec R, Canadell E (1997) New low-dimensional solids tellurium-rich alkali metal tellurides. Adv Mater 9 669-675 Zheng Zh, Greedan JE (2004) Rare earth elements and materials. In Meyers RA (ed) Encyclopedia of Physical Science and Technology - Inorganic Chemistry. Elsevier Science, URL ... 

Alkali-metal salts, 24 145 Alkali-metal tellurides, 24 417 Alkali-metal thermal electric conversion (AMTEC), 22 773-774 Alkali-metal titanates, 25 43 44 Alkaline autoclaving, selenium recovery via, 22 81... 

For example, no less than 12 different formula types are now known for the alkali metal tellurides MxTey [9, 10]. As the total bond order for Te-Te bonds and their opposite secondary Te---Te interactions must remain constant at 1.0, distances di/di will increase in logarithmic dependence on their individual bond order as d3/d4 shorten. Values of d-y/di can range from those of typical single bonds (269-287 pm [10]) to 304 + 9 pm for symmetrical and modestly distorted 3-center 4-electron interactions. 

As will be discussed in Section 2.7.3.1, a number of duster-like non-valence precise Te moieties (n = 4, 6) have also been identified in alkali metal tellurides but these alleviate their electron surplus by participating in asymmetric linear 3-... 

Disubstituted tellurins were obtained by reduction (with DIBAL-Fl) of the the 4-oxo-4//-tellurins, prepared by the addition of alkali metal tellurides to... 

The easily accessible ethynyl tellurolates were reacted with chloroiodomethane to give ethynyl chloromethyl tellurium, which, in turn, combined with an alkali metal telluride to form (ethynyltelluro)methanetellurolates. These compounds cyclized through intramolecular addition of the tellurolate to the C —C triple bond to 2/7-1,3-ditelluroles3,4... 

One common present day preparation of dialkyl mono-and ditellurides involves the reaction of alkyl halides with alkali metal tellurides that have been prepared in situ. The reactions are commonly carried out in aqueous or nonaqueous solutions. Solutions of sodimn in liquid ammonia also provide a useful media for the reduction of tellurium. ... 

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