Carbon monosulfide

Carbon monosulfide is a <a href="/facts/Chemical_compound/37FXqqtv">chemical compound</a> with the <a href="/facts/Chemical_formula/hghUtthl">formula</a> CS. This <a href="/facts/Diatomic_molecule/hkfKAC7m">diatomic molecule</a> is the sulfur analogue of <a href="/facts/Carbon_monoxide/CKuLtEMJ">carbon monoxide</a>, and is unstable as a solid or a liquid, but it has been observed as a gas both in the laboratory and in the <a href="/facts/Interstellar_medium/mokU0WEz">interstellar medium</a>. The molecule resembles carbon monoxide with a triple bond between carbon and sulfur. The molecule is not intrinsically unstable, but it tends to polymerize in sunlight to a brown mass, as first discovered in 1868 and 1872. The polymer is quite stable, decomposing a little at 360 °C to carbon disulfide. This tendency towards polymerization reflects the greater stability of C–S single bonds. 
<a href="/facts/Polymer/eF32E50K">Polymers</a> with the formula (CS)n have been reported, and the formal dimer is <a href="/facts/Ethenedithione/E6DuURlb">ethenedithione</a>. Also, CS has been observed as a ligand in some <a href="/facts/Transition_metal_complex/1tCyeQUm">transition metal complexes</a>.
The simplest carbon monosulfide synthesis decomposes <a href="/facts/Carbon_disulfide/b04Tadmy">carbon disulfide</a> in a high-voltage AC arc.

Carbon monosulfide open-in-new

Carbon monosulfide