Dicarbon monoxide

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Dicarbon monoxide
Stick model of dicarbon monoxide
Spacefill model of dicarbon monoxide
Ball and stick model of dicarbon monoxide
IUPAC name
Other names
119754-08-4 YesY
ChemSpider 164756 YesY
Jmol-3D images Image
PubChem 189691
Molar mass 40.02 g·mol−1
Except where noted otherwise, data is given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Dicarbon monoxide (C2O) is an extremely reactive molecule that contains two carbon atoms and one oxygen atom. Dicarbon monoxide, covalently bonded, is a product of the photolysis of carbon suboxide.[1][2] It is closely related to CO, CO2 and C3O2, and other oxocarbons.

C3O2 → CO + C2O

It is stable enough to observe reactions with NO and NO2.[3]


  1. ^ Bayes, K. (1961). "Photolysis of Carbon Suboxide". Journal of the American Chemical Society 83 (17): 3712–3713. doi:10.1021/ja01478a033. 
  2. ^ Anderson, D. J.; Rosenfeld, R. N. (1991). "Photodissociation of Carbon Suboxide". Journal of Chemical Physics 94 (12): 7857–7867. doi:10.1063/1.460121. 
  3. ^ Thweatt, W. D.; Erickson, M. A.; Hershberger, J. F. (2004). "Kinetics of the CCO + NO and CCO + NO2 reactions". Journal of Physical Chemistry A 108 (1): 74–79. doi:10.1021/jp0304125.