Diphenyl- telluronium iodide

Triphenyl telluronium chloride or methyl diphenyl telluronium iodide dissolved in hot water precipitated the corresponding telluronium pseudohalide when mixed with an aqueous solution of an alkali metal or silver pseudohalide. 

When allyl diphenyl telluronium bromide was treated with iodide in chloroform solution, diphenyl tellurium bromide iodide was isolated on evaporation of the solvent3. Similar reactions with iodine bromide produced only diaryl tellurium dibromides3. 

Diphenyl Naphthyl Telluronium Iodide1 10 g (28 mmol) of diphenyl tellurium dichloridc are dissolved in 250 ml of dry toluene. A solution of 1 -naphthyl magnesium bromide in diethyl ether is prepared from 17.4 g (84 mmol) of 1-bromonaphthalene. The solution of the tellurium compound is quickly poured into the freshly prepared Grignard solution, the mixture is shaken vigorously, and 20 ml of dilute hydrochloric acid are added immediately. The solution is decanted from the precipitate, the precipitate is dissolved in boiling water, silver chloride is added, and the mixture is heated. The mixture is then filtered, sodium sulfite is added to the filtrate, and the telluronium iodide is precipitated by the addition of potassium iodide yield 11.8 g (78%) m.p. 148° (from ethanol, ethanol/diethyl ether). 

Diphenyl Methyl Telluronium Benzoate8 1.0 g (2 mmol) of diphenyl methyl telluronium iodide and 0.46 g (2 mmol) of silver benzoate in 50 ml of distilled water are stirred at 20° for 0.5 h and then heated under reflux for 4 h. Silver iodide is filtered off, the filtrate is concentrated under vacuum at 20°, and the precipitate is filtered off and dried over phosphorus pentoxide m.p. 105". 

Diphenyl Methyl Telluronium Tetrafluoroborate4 0.5 g (1.2 mmol) of diphenyl methyl telluronium iodide are dissolved in water. An aqueous solution containing 0.23 g (1.2 mmol) of silver tetrafluoroborate is prepared by reacting equivalent amounts of silver oxide and tetrafluoro boric acid. The solutions are mixed, stirred for 1 h at 20°, heated under reflux for 4 h, and concentrated. Silver iodide is filtered off and the product crystallized m.p. 135°. 

Diphenyl Methyl Telluronium Hexaflnorophosphate8 30 g of IRA 400 resin are converted to the hexafluorophosphate form and added to 200 ml of water containing 0.2 g (0.5 mmol) of diphenyl methyl telluronium iodide. The mixture is stirred and warmed gently for 4 h, filtered, and the filtrate concentrated to give the colourless crystalline product m.p. 135°. 

Telluronium Diphenyl-methyl-(iodid) IX, 1078 El 2b, 697/700ff. (Salze)... 

Tellurophthalide in benzene solution was hardly affected by irradiation with 300 nm light, with phenyl magnesium bromide diphenyl ditellurium was formed. Methyl iodide removed tellurium from the heterocycle yielding trimethyl telluronium iodide. ... 

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