From Tetrakis 2,2,3,3-tetrafluoropropoxy Tellurium

Addition of arenethiols to ethanolic solutions of tetrakis[2,2,3,3-tetrafluoropropoxy] tellurium at — 50° precipitated quantitatively a mixture of bis[arylthio] tellurium compounds and diaryl disulfanes. Recrystallization from petroleum ether separated the two products.  

Bis[4-Chlorophenylthio] Tellurium 3.6 g (25 mmol) of 4-chlorobenzenethiol are dissolved in 25 ml of anhydrous ethanol, the solution is cooled to — 50°, and 3.25 g (5 mmol) of tetrakis[2,2,3,3-tetrafluoropropoxy] tellurium are added dropwise. The mixture is stirred for 10 min, filtered, the solid is washed with chilled (— 20°) diethyl ether, dried under reduced pressure at 0°, and recrystallized from petroleum ether at low temperature yield 2.07 g (100%), m.p. 105 107°. 

The diaryl disulfanes were obtained upon evaporation of the filtrate. 

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