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 .

There is a branched isomer of disulfur difluoride, thiothionyl fluoride, with the structure .

Synthesis

Silver(II) fluoride 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:

References