Telluronium 4 Ethoxyphenyl

Ethoxyphenyl Methyl Tellurium Diiodide1 A mixture of 1 g (1.98 mmol) of bis[ethoxyphenyl] ditcllurium and 50 g (0.35 mol) of methyl iodide is heated under reflux for 0.5 h. The yellow precipitate of dimethyl 4-ethoxyphenyl telluronium iodide is filtered off. Light petroleum ether is added to the cold filtrate to crystallize the product yield 0.34 g (33%) m.p. 108°. 

Ethoxyphcnyl Tetramethylene Telluronium Bromide1 A solution of 3.08 g (6.2 mmol) of bis[4-ethoxyphenyl] ditellurium in a mixture of 2.5 ml of benzene and 7.5 ml of ethanol is heated under reflux. 0.04 g (10 mmol) of sodium borohydride dissolved in 8.5 ml of 1 molar aqueous sodium hydroxide solution followed by 0.22 g (1 mmol) of 1,4-dibromobutane dissolved in 5 ml of benzene are added dropwise to the refluxing solution. The warm mixture is stirred for 30 min, filtered, the solid is washed with diethyl ether, and dried under vacuum yield 0.30 g (80%) m.p. 280° (from acetonitrile). 

Triphenyl Telluronium 4-Edioxyphenyltetrachlorotellurate(IV)1 0.36 g(l mmol) of4-ethoxyphenyl tellurium trichloride are dissolved in 6 molar hydrochloric acid and a solution of 0.44 g (1 mmol) of triphenyl telluronium bromide in 20 ml of water is added dropwise with stirring. The precipitate is filtered off yield 0.80 g (100%) m.p. 143°. 

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