| |||
Names | |||
---|---|---|---|
IUPAC name
fluorosulfanyl thiohypofluorite
| |||
Other names
Difluorodisulfane[1]
| |||
Identifiers | |||
3D model (JSmol)
|
|||
ChemSpider | |||
PubChem CID
|
|||
CompTox Dashboard (EPA)
|
|||
| |||
| |||
Properties | |||
S2F2 | |||
Molar mass | 102.127 g/mol | ||
Melting point | −133 °C (−207 °F; 140 K) | ||
Boiling point | 15 °C (59 °F; 288 K) | ||
Related compounds | |||
Related compounds
|
|||
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
|
Disulfur difluoride is an inorganic compound with the chemical formula S2F2. It is a halide of sulfur.
Disulfur difluoride has a chain structure F−S−S−F. The angle between the Fa−S−S and S−S−Fb planes is 87.9°, while the angles of Fa−S−S and S−S−Fb are equivalent, and are equal to 108.3°. Both S−F bonds are equivalent and their length is 163.5 pm, while the length of the S−S bond is 189 pm. This structure is referred to as gauche, and is similar to H2O2.
There is a branched isomer of disulfur difluoride, thiothionyl fluoride, with the structure S=SF2.
Silver(II) fluoride can fluorinate sulfur in a strictly dry container at 125 °C (257 °F; 398 K), and the reaction produces FS−SF:[2]
Disulfur difluoride undergoes intramolecular rearrangement in the presence of fluorides of alkali metals, yielding the isomer S=SF2:[3]