From Diorgano Tellurium Compounds

Bis[trifluoromethyl] tellurium irradiated for 54 hours in furan solution was converted to bis[trifluoromethy[ ditellurium that was isolated in 43% yield as a red oiP. 

Bis[trifluoromethyl] Ditellurium An apparatus for irradiation consisting of a reaction vessel, a low-temperature (— 25°) cooler with argon adapter, and an external mercury high-pressure lamp (Heraeus, TQ 150) is assembled. Under an atmosphere of argon 2.65 g (10 mmol) bis[trifluoromethyl] tellurium, 13.6 g (200 mmol) furan, and several glass rings are plaeed into the reaction vessel. The mixture is irradiated for 54 h and stirred to remove the tellurium mirror from the walls of the reaction vessel. The solvent is distilled at atmospheric pressure until the bath temperature reaches 80°. The residue is distilled at 0.001 torr by increasing the temperature slowly from — 78° to + 25° yield 43% b.p. 120°/760 torr. 

Dibenzyl ditellurium compounds were obtained as photo- and thermolabile crystals, when dibenzyl tellurocyanates were treated with hypophosphorous acid.  

When aromatic nitro compounds were reduced in dimethylformamide with disodium telluride to aza derivatives, bis[dimethylaminocarbonyl ditellurium was obtained in 5 to 15% yield as a by-product. The formation of this ditellurium compound was attributed to the capture of a telluride anion by a dimethylcarbamoyl radical and subsequent oxidation of the tellurocarbamoyl species . 

The compound (yellow crystals) is stable in the dark for weeks, but rapidly decomposes in solution. 

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From Diorgano Tellurium Compounds and Interhalogen Compounds... 

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