Triphenyl Tellurium Cyanide

Triphenyl tellurium cyanide (triphenyl telluronium cyanide) was prepared by passing an ethanolic solution of triphenyl telluronium chloride through an anion exchange column in the cyanide form  

Triphenyl Tellurium Cyanide 20 g of a Baker CHA-541 resin are treated with aqueous sodium cyanide solution, the column is washed with ethanol/water mixtures with increasing ethanol content, and, finally, the column is covered with 95% ethanol. A solution of 0.1 g (2.5 mmol) of triphenyl telluronium chloride in 60 ml of 95% ethanol is slowly passed through the column. The column is eluted with 200 ml of ethanol, the eluate is evaporated, the oily residue is triturated with ethyl acetate, and the crystals are collected, washed with ethyl acetate, and dried under vacuum yield 0.82 g (85%) m.p. 184° (dec.). 

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