Poly 1,4-phenylene tellurium

Similarly obtained was polyf 1,4-phenylenedimethylene tellurium) (x = 90)2in 83% yield1. When heated in dimethylformamide at 110-120° sodium telluride and 1,4-diiodobenzene gave poly(phenylene tellurium) (m.p. 162-170°) in 70% yield4. 

Poly(l,4-phenylene Ditellurium)1 Under nitrogen, a solution of 1 mol of 1,4-dibromobenzene is cooled to — 15° with stirring, a solution of 22 mol of butyl lithium in hexane is added dropwise followed by 1 mol of finely ground tellurium, and the mixture is stirred at 20° until all of the tellurium has dissolved. To this mixture is added 2 mol of butyl lithium followed by 1 mol of powdered tellurium. When all of the tellurium has dissolved, 2 mol of water and then 2 mol of triethylaminc arc added. The resultant tellurolate is oxidized by addition of an aqueous solution of potassium hexacyanoferrate(Ill) yield 54% reddish-brown, amorphous powder. 

Dilithium or disodium areneditellurolates were alkylated with methyl iodide, dimethyl sulfateX or diethyl sulfate. The areneditellurolates were prepared from the corresponding dibromides and tert.-butyl lithium in tetrahydrofuran and treatment of the resulting mixture with powdered tellurium, or by the reduction of poly(l,4-phenylene ditellurium) with sodium borohydride in ethanol/benzene". ... 

We report the first syntheses of the selenium and tellurium analogs of the thermoplastic poly-p-phenylene sulfide (PPS), i.e., PPSe and PPTe, by reaction of p-dihalobenzenes with new alkali chalcogenide reagents under conditions significantly milder than those reported for PPS. The chemical, thermal, structural, and electrical properties of PPSe and PPTe are compared to those of PPS. While PPSe exhibits good thermal stability,... 

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