Technetium pentafluoride

Technetium pentafluoride is formed as a by-product of technetium hexafluoride when technetium metal powder is heated to 350 " C in an F2/N2 stream [59], or by the action of I2 on TcF 5 in IFs solution [60] ... 

The iodine and technetium analogues of osmium oxide pentafluoride presumably can exist. Even ruthenium oxide... 

Technetium oxide tetrafluoride like the pentafluoride is formed as a by-product of TcFf, in the lluorination of technetium metal [59,78,79]. TCOF4 forms two phases that may be separated from TcFs and from one another by vacuum sublimation. One phase of TcOF forms blue needles, has a chain structure, and is isostructural with its rhenium analogue. The other modification is a more volatile green compound of tri-meric structure [78,79]. 

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