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Table 4
Gas-phase and grain-surface chemical routes proposed in the literature for the formation of EF.
| Gas-phase chemistry | ||
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| (1) | C2H5OH (ET) + H+−→ C2H5OH |
Charnley et al. (1995) |
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| (2a) | C2H5OH (ET+) + H2CO −→ HC(OH)OC2H + H2 |
Charnley et al. (1995) |
| (2b) | HCOHOC2H + e−−→ C2H5OCHO (EF) + H |
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| (3a) | C2H5OH (ET+) + HCOOH −→ HC(OH)OC2H + H2O |
Taquet et al. (2016) |
| (3b) | HC(OH)OC2H + NH3−→ C2H5OCHO (EF) + NH |
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| Grain-surface chemistry | ||
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| (4a) | HCO + 2H −→ CH3O | Garrod et al. (2008) |
| (4b) | CH3O + HCO −→ CH3OCHO (MF) | & Belloche et al. (2009) |
| (4c) | CH3OCHO (MF) + hν−→ CH2OCHO | |
| (4d) | CH2OCHO + CH3−→ C2H5OCHO (EF) | |
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| (5a) | HCO + 2H −→ CH2OH | Garrod et al. (2008) |
| (5b) | CH2OH + CH3−→ C2H5OH (ET) | & Belloche et al. (2009) |
| (5c) | C2H5OH (ET) + hν−→ C2H5O | |
| (5d) | C2H5O + HCO −→ C2H5OCHO (EF) | |
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