Disulfur dibromide

Disulfur dibromide is the inorganic compound with the formula S2Br2. It is a yellow-brown liquid that fumes in air. It is prepared by direct combination of the elements and purified by vacuum distillation.[1] The compound has no particular application, unlike the related sulfur compound disulfur dichloride.

Disulfur dibromide
Ball-and-stick model of sulfur dibromide
Disulfur-dibromide-3D-vdW.png
Names
IUPAC name
bromosulfanyl thiohypobromite
Other names
Dibromodisulfane
Bromosulfanyl thiohypobromite
Identifiers
3D model (JSmol)
ChemSpider
ECHA InfoCard 100.032.821
EC Number
  • 236-119-1
UNII
  • InChI=1S/Br2S2/c1-3-4-2
    Key: JIRDGEGGAWJQHQ-UHFFFAOYSA-N
  • S(SBr)Br
Properties
Br2S2
Molar mass 223.940 g mol−1
Appearance orange/yellow liquid
Density 2.703 g/cm3
Boiling point 46–48 °C (115–118 °F; 319–321 K) 0.1 mm Hg
Structure
C2, gauche
Hazards
GHS labelling:
GHS05: CorrosiveGHS07: Exclamation markGHS09: Environmental hazard
Danger
Safety data sheet (SDS) ICSC 1661
Related compounds
Related
Sulfur dibromide
Thionyl bromide
Sulfuryl bromide
Related compounds
 Disulfur difluoride
Disulfur dichloride
Disulfur diiodide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

The molecular structure is akin to that of disulfur dichloride (S2Cl2). According to electron diffraction measurements, the BrSSBr dihedral angle is 84° and the Br-S-S angle is 107°. The S-S distance is 1.980 Å, ca. 0.050 Å shorter than for S2Cl2.[2]

References
  1. F. Fehér (1963). "Dibromodisulfane". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. Vol. 1. NY, NY: Academic Press. pp. 377–378.
  2. Zysman-Colman, Eli; Harpp, David (2004). "Comparison of the Structural Properties of Compounds Containing the XSSX Moiety (X = H, Me, R, Cl, Br, F, OR)". Journal of Sulfur Chemistry. 25: 291-316. doi:10.1080/17415990410001710163. S2CID 95468251.
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