Carbon monosulfide

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Carbon monosulfide
Lewis structure, showing a C−S bond distance of 1.5349 angstroms
Space-filling model of the carbon monosulfide molecule
IUPAC name
carbon monosulfide
Other names
carbon(II) sulfide, thiocarbonyl, sulfidocarbon, methanidylidynesulfanium
3D model (JSmol)
1697516, 1918616
Molar mass 44.07 g·mol−1
Appearance reddish crystalline powder
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

Carbon monosulfide is a chemical compound with the formula CS. This diatomic molecule is the sulfur analogue of carbon monoxide, and is unstable as a solid or a liquid, but it has been observed as a gas both in the laboratory and in the interstellar medium.[1] The molecule resembles carbon monoxide with a triple bond between carbon and sulfur. The molecule is not intrinsically unstable, but it tends to polymerize. This tendency reflects the greater stability of C−S single bonds.

Polymers with the formula (CS)n have been reported.[2] Also, CS has been observed as a ligand in certain transition metal complexes.


  1. ^ Wilson, R. W.; Penzias, A. A.; Wannier, P. G.; Linke, R. A. (1976). "Isotopic abundances in interstellar carbon monosulfide" (pdf). Astrophysical Journal. 204 (pt 2): L135–L137. Bibcode:1976ApJ...204L.135W. doi:10.1086/182072.
  2. ^ Chou, J.-H.; Rauchfuss, T. B. (1997). "Solvatothermal Routes to Poly(Carbon Monosulfide)s Using Kinetically Stabilized Precursors" (pdf). Journal of the American Chemical Society. 119 (19): 4537–4538. doi:10.1021/ja970042w.