Bromine pentafluoride (BrF5) is a liquid at room temperature (meIting point, -61.3°C; boiling point, 40.5°C) and is a good oxidizing agent capable of converting all uranium fluorides, including urany} difluoride (UO2F2,) to uranium hexafluoride at room temperature; its oxidizing capability improves with temperature (Jerry and SteindIer, 1967, 1968; Holmes et al., 1969~.
Dioxygendifluoride (O2F2; FOOF) is a fast-acting oxidizing agent capable of converting either UF4 or PuF4 to its hexafluoride (UFO or PuF6) at room temperature (Eller et al., 1988~.
Krypton difluoride cannot be used to fluorinate the molten salt at 460°C because it is not stable at elevated temperature.
Dioxygendifluoride is readily prepared, stored and transferred to the place of reaction.
Moreover, the reaction of a fluorinating agent with every warm surface in its pathway makes it very difficult to introduce the fluorinating agent into the region of interest.
Dioxygendifluoride was first prepared and isolated in 1933.
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