Disulfur difluoride
Disulfur difluoride is an inorganic compound with the chemical formula. It is a halide of sulfur.
Structure
Disulfur difluoride has a chain structure. The angle between the and planes is 87.9°, while the angles of and are equivalent, and are equal to 108.3°. Both bonds are equivalent and their length is 163.5 pm, while the length of the bond is 189 pm. This structure is referred to as gauche, and is similar to [Hydrogen peroxide|].There is a branched isomer of disulfur difluoride, thiothionyl fluoride, with the structure.
Synthesis
can fluorinate sulfur in a strictly dry container at, and the reaction produces :Reactions
Disulfur difluoride undergoes intramolecular rearrangement in the presence of fluorides of alkali metals, yielding the isomer S=SF2:- Decomposing to sulfur tetrafluoride and sulfur when heated to 180 °C:
- Hydrolysis:
- Reacting with sulfuric acid at 80 °C:
- Reacting with sodium hydroxide:
- Reacting with oxygen at high pressure, using nitrogen dioxide as a catalyst: