From Pentafluorotellurium Hypohalites

Pentafluorotellurium hypofluorite added to fluoroolefins to produce fluoroalkyloxy tellurium pentafluorides  

When unsymmetric fluoroolefins were used, mixtures of the possible isomers were formed as ascertained by F-NMR spectroscopy. 

Pentafluoroethoxy Tellurium Pentafluoride Into a 30 ml stainless steel Hook cylinder cooled to —196° are condensed in succession from a vacuum line 0.366 g (1.42 mmol) of pentafluorotellurium hypofluorite and 0.230 g (2.30 mmol) of tetrafluoroethene. The cylinder is sealed and slowly allowed to warm to 20° in a cold, empty Dewar vessel or in one partly filled with dry ice. After 48 h, the cylinder is recooled to — 196° and any noncondensable gases are removed. The cylinder is again warmed to 20° and the gases arc allowed to pass through a series of three traps kept at temperatures above —112°,at —112°,and below —112°. The product condenses in the —112 trap and is purified by an additional trap-to-trap distillation yield 0.30 g (60%) Similarly obtained (trapping temperature given) were  

Hexafluorobenzene and pentafluorotellurium hypofluorite produced, after four days at 25°, a 50% yield of hexafluorocyclo-hexa-2,5-dien-l-yloxy tellurium pentafluoride. Similar reactions with pentafluorotellurium hypochlorite gave much lower yields of addition products.  

Xenon bis[pentafluoro(oxo)tellurate(VI)], when heated with fluoroolefins for several days, added two pentafluoro(oxo)tellurate(VT) groups to the olefin .  

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