Chemistry: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
Related compounds
Other anions
Carbon monoxide
Other cations
Silicon monosulfide
Germanium monosulfide
Tin(II) sulfide
Lead(II) sulfide
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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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 some transition metal complexes.


  1. Wilson, R. W.; Penzias, A. A.; Wannier, P. G.; Linke, R. A. (1976). "Isotopic abundances in interstellar carbon monosulfide". Astrophysical Journal 204 (pt 2): L135–L137. doi:10.1086/182072. Bibcode1976ApJ...204L.135W. 
  2. Chou, J.-H.; Rauchfuss, T. B. (1997). "Solvatothermal Routes to Poly(Carbon Monosulfide)s Using Kinetically Stabilized Precursors". Journal of the American Chemical Society 119 (19): 4537–4538. doi:10.1021/ja970042w.