From Diaryl Tellurium Hydroxide Halides and Potassium Iodide

From Diaryl Tellurium Hydroxide Halides and Potassium Iodide 

Because diaryl tellurium diiodides are not hydrolyzed by boiling water, the diaryl tellurium hydroxide iodides were prepared by treating the hydroxide chlorides or bromides with potassium iodide.  

Diphenyl Tellurium Hydroxide Iodide Diphenyl tellurium chloride (or bromide) hydroxide is dissolved in water and a slight excess of potassium iodide dissolved in water is added. The yellow precipitate is filtered off and recrystallized from methanol. For dissolution of the product in methanol, the mixture is heated cautiously on a water bath to prevent the hydroxide iodide from disproportionating to the diiodide and the dihydroxide (or oxide). The pure product has m.p. 215° 

Similarly prepared was bis[4-methylphenyl] tellurium hydroxide iodide -, m.p. 204° 

Bis[2-methylphenyl] tellurium hydroxide iodide decomposed to the diiodide and the oxide during attempts at recrystallization from methanol.  

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