Article · Wikipedia archive · Last revised Aug 1, 2026

Octasulfur monoxide

Octasulfur monoxide is an inorganic compound with a chemical formula S8O, discovered in 1972. It is a type of sulfur oxide.

Last revised
Aug 1, 2026
Read time
≈ 1 min
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223 w
Citations
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Source
Wikipedia ↗
Octasulfur monoxide
source ↗
Names
Other names
  • Cyclooctasulfane oxide
  • Octathiocane oxide
Identifiers
3D model (JSmol)
ChemSpider
  • InChI=1S/OS8/c1-9-7-5-3-2-4-6-8-9
    Key: ZNJJQQGMZXVPNK-UHFFFAOYSA-N
  • O=S1SSSSSSS1
Properties
S8O
Molar mass 272.48 g·mol−1
Appearance Yellowish sharp crystal1
Density 2.13 g·cm−3
Solubility 0.8 g（carbon disulfide)1
Structure2
Orthorhombic
Pca21
a = 13.197, b = 7.973, c = 8.096
Related compounds
Related compounds
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

Octasulfur monoxide is an inorganic compound with a chemical formula S8O, discovered in 1972. It is a type of sulfur oxide.1

A crystalline compound composed of cyclooctasulfur monoxide and antimony pentachloride in equimolar quantities can be made (S8O·SbCl5).3

References

References

  1. Ralf Steudel, Michael Rebsch (April 1972). "Preparation of cyclo-Octasulfur Oxide, S8O". Angewandte Chemie International Edition in English. 11 (4): 302–303. doi:10.1002/anie.197203021. ISSN 0570-0833.
  2. Steudel, Ralf; Luger, Peter; Bradaczek, Hans; Rebsch, Michael (May 1973). "Crystal and Molecular Structure of Cyclooctasulfur Oxide, S8O". Angewandte Chemie International Edition in English. 12 (5): 423–424. doi:10.1002/anie.197304231.
  3. Steudel, Ralf; Sandow, Torsten; Steidel, Jürgen (1980). "Reversible isomerization of cyclo-octasulphur monoxide; preparation and X-ray crystal structure of S8O·SbCl5". J. Chem. Soc., Chem. Commun. (4): 180–181. doi:10.1039/C39800000180.
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