Sulfur difluoride

From Wikipedia, the free encyclopedia
Jump to: navigation, search
Sulfur difluoride
IUPAC name
sulfoxylic difluoride
3D model (Jmol) Interactive image
ChemSpider 123122
PubChem 139605
Molar mass 70.062 g/mol
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Sulfur difluoride is an inorganic compound with the chemical formula SF2. It can be generated by the reaction of sulfur dichloride and potassium fluoride or mercury(II) fluoride at low pressures:

SCl2 + 2 KF → SF2 + 2 KCl
SCl2 + HgF2 → SF2 + HgCl2

The F-S-F bond angle is 98°, and the length of S-F bond is 159 pm.[1] The compound is highly unstable with respect to FSSF3. This unsymmetrical isomer of S2F4 is proposed to arise via insertion of SF2 into the S-F bond of a second molecule SF2:[2]

It can also be formed from oxygen difluoride and hydrogen sulfide:

OF2 + H2S → SF2 + H2O


  1. ^ Johnson, D. R.; Powell, F. X. (1969). "Microwave Spectrum and Structure of Sulfur Difluoride". Science. 164 (3882): 950–1. doi:10.1126/science.164.3882.950. PMID 17775599. 
  2. ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 0-08-037941-9.