With Group IV Element Halides

Bis[trimethylsilyl] tellurium reacted with excess alkylfluorogermanes at 20° with release of fluorotrimethylsilane.  

Bis[triethylsilyl] tellurium or bis[triethylgermyl] tellurium were heated with trisfpenta-fluorophenyl]bromostannane in toluene at 100° for two hours. Evaporation of the solvent, dissolution of the residue in petroleum ether, and chilling the solution to —10°, precipitated crystals of bis[tns(pentafluorophenyl)stannyl] tellurium (m.p. 118°) in 51% yield .  

Removal of the volatile f-butyldimethylchlorosilane from a mixture of chloro-tris[trifluoromethyl] germane and bis[t-butyldimethylsilyl] tellurium that had been kept at 80° for two days gave bis[tris(trifluoromethyl)germyl] tellurium in 52% yield. The compound can be stored at — 80° without decomposition . 

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