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 The Cs, D3h, and C2v isomers of carbon trioxide | |
| Names | |
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| IUPAC names
Carbon trioxide
D3h isomer:
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| Systematic IUPAC name
C2v isomer:
D3h isomer:
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| Other names
Cs isomer:
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| Identifiers | |
3D model (JSmol) |
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PubChem CID |
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| Properties | |
| CO3 | |
| Molar mass | 60.008 g·mol−1 |
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 trioxide (CO3) is an unstable oxideofcarbon (anoxocarbon). The possible isomers of carbon trioxide include ones with molecular symmetry point groups Cs, D3h, and C2v. The C2v state, consisting of a dioxirane, has been shown to be the ground state of the molecule.[1] Carbon trioxide should not be confused with the stable carbonate ion (CO2−
3).
Carbon trioxide can be produced, for example, in the drift zone of a negative corona discharge by reactions between carbon dioxide (CO2) and the atomic oxygen (O) created from molecular oxygen by free electrons in the plasma.[2] Another reported method is photolysis of ozone O3 dissolved in liquid CO2, or in CO2/SF6 mixtures at −45 °C, irradiated with light of 253.7 nm. The formation of CO3 is inferred but it appears to decay spontaneously by the route
with a lifetime much shorter than 1 minute.[3] Carbon trioxide can be made by blowing ozoneatdry ice (solid CO2), and it has also been detected in reactions between carbon monoxide (CO) and molecular oxygen (O2). Along with the ground state C2v isomer,[4] the first spectroscopic detection of the D3h isomer was in electron-irradiated ices of carbon dioxide.[5]
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Inorganic compounds of carbon and related ions
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| Compounds |
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| Carbon ions |
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| Nanostructures |
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| Oxides and related |
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