Disulfur dibromide

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
CAS Number	13172-31-1 ;
3D model (JSmol)	Interactive image;
ECHA InfoCard	100.032.821
EC Number	236-119-1;
PubChem CID	123296;
CompTox Dashboard (EPA)	DTXSID00157189 ;
	InChI InChI=1S/Br2S2/c1-3-4-2 Key: JIRDGEGGAWJQHQ-UHFFFAOYSA-N;
	SMILES S(SBr)Br;
Properties
Chemical formula	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
Coordination geometry	C2, gauche
Hazards
Safety data sheet	ICSC 1661
EU classification (DSD) (outdated)	Corrosive (C); Irritant (Xi); Dangerous for the environment (N)
R-phrases (outdated)	R14, R34, R37, R50
S-phrases (outdated)	(S1/2), S26, S45, S61
Related compounds
Related	Sulfur dibromide; Thionyl bromide; Sulfuryl bromide
Related compounds	Disulfur difluoride; Disulfur dichloride
	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

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.

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

F. Fehér (1963). "Dibromodisulfane". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. 1. NY, NY: Academic Press. pp. 377–378.
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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[1] F. Fehér (1963). "Dibromodisulfane". In G. Brauer (ed.). Handbook of Preparative Inorganic Chemistry, 2nd Ed. 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.