From Tellurium Tetrafluoride

Heating tellurium tetrafluoride and fluoroalkoxytrimethylsilane (1 2 molar ratio) in benzene for 2 h produced bis[fluoroalkoxy] tellurium difluorides in high yields  

The same compounds were obtained by refluxing equimolar amounts of tellurium tetrafluoride and tellurium tetrakis[fluoroalkoxides] in benzene  

3-tetrafluoropropoxy] Tellurium Difluorideh 6.1 g (30 mmol) of tellurium tetrafluoride are suspended in 50 ml of anhydrous benzene, 12.2 g (60 mmol) of 2,2,3,3-tetrafluoro-l-trimethylsiloxypropane are added dropwise with stirring, the mixture is heated at 70° for 2 h, and filtered. Fluorotrimethylsilane and benzene are distilled from the filtrate and the residue is distilled under vacuum yield 11.1 g (87%) b.p. 95°/0.03 torr. 

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Te(OTeFs )e can be prepared from tellurium tetrafluoride and B(OTeF5)3 " upon treatment with Xe(OTeF5)2. ... 

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