Disulfur difluoride

Disulfur difluoride
IUPAC name fluorosulfanyl thiohypofluorite
Identifiers
PubChem	123323
ChemSpider	109926
Jmol-3D images	Image 1
SMILES FSSF
InChI InChI=InChI=1S/F2S2/c1-3-4-2
Properties
Molecular formula	S2F2
Molar mass	102.127
Except where noted otherwise, data are given for materials in their standard state (at 25 °C, 100 kPa)
Infobox references

Disulfur difluoride is a halide of sulfur, with the chemical formula S₂F₂. Silver(II) fluoride can fluorinate sulfur in a strictly dry container, and the reaction produces FS-SF:

$\rm \ 2S + 2AgF_2 \xrightarrow{398K} S_2F_2 + 2AgF$

Disulfur difluoride will undergo intramolecular rearrangement with the existence of alkali elements' fluorides, obtaining the isomer S=SF₂：

$\rm \ FS-SF \xrightarrow{KF} S=SF_2$

S=SF₂ can be synthesized with the reaction of potassium fluorosulfinate and sulfur dichloride:

$\rm \ 2KSO_2F + S_2Cl_2 \rightarrow S=SF_2 + 2KCl + 2SO_2$^[1]

References

1. ^ 张青莲. 《无机化学丛书》第五卷：氧、硫、硒分族. Beijing: Science Press. pp. P179. ISBN 7-03-002238-6.