Ammonium tellurolate

Alkali Metal, Ammonium, and Phosphonium Tellurolates (Preparation)... 

The bis[triphenylphosphoranylidene]ammonium salt of the anionic hydridoundecacar-bonyltriosmate cluster reacted with bis[4-methoxyphenyl] tellurium dichloridc in dichloro-methane to form in 7 percent yield a neutral triosmium cluster with one bridging 4-methoxybenzene tellurolate group2. 

Methoxyphenyl Phenyl Tellurium (Grignard Method) Phenyl magnesium bromide is prepared from 0.84 g (35 mmol) of magnesium and 5.5 g (35 mmol) of bromobenzene in 15 m/ of absolute diethyl ether under nitrogen and the resultant solution is cooled in an ice/watcr bath. 4.7 g (10 mmol) of bis [4-methoxyphenyl] ditellurium dissolved in 100 ml of absolute diethyl ether are added dropwise to the Grignard solution. Then 250 ml of petroleum ether (b.p. 30- 50°) are added to precipitate the tellurolate and the mixture is allowed to stand for 2 h. The precipitate is filtered off, the filtrate is mixed with aqueous ammonium chloride solution, the organic phase is separated, dried with sodium sulfate, and the solvent is evaporated. Methanol is added to the oily residue to crystallize the product yield 3.1 g (100%) m.p. 61° (from methanol). 

S-Aryltelluro vinyl aldehydes and ketones have been prepared by treating j -chlorovinyl carbonyl compounds or /(-acylvinyl triethyl ammonium chlorides with arene tellurolate anions. ... 

Tellurocarboxylates (RCOTe") are considered to be one of the most fundamental starting compounds for the synthesis of tellurol esters. However, due to their instability, tellurocarboxylates were not described in the literature until the mid-80s. Kato and co-workers synthesized ammonium or potassium tellurocarboxylates by reacting bis(acyl) telluride 88 with primary or secondary amines or potassium ethoxide, and trapped them with methyl iodide, giving rise to tellurol esters (Eq. 59) [114]. 

---