Table 1
Vibrational transitions and band strengths of molecules considered in this paper.
| Structure | Chemical formula | Name | λ [µm] | v [cm−1] | Identification | 𝒜 [cm molec−1 | References |
|---|---|---|---|---|---|---|---|
 |
H2O | Water | 13.20 | 760 | libration | 3.2 × 10−17 | [1] |
 |
CH4 | Methane | 7.67 | 1303 | CH4 def. | 8.4 × 10−18 | [1] |
 |
SO2 | Sulfur dioxide | 7.60 | 1320 | SO2 stretch | 3.4 × 10−17 | [2] |
 |
H2CO | Formaldehyde | 8.04 | 1244 | CH2 rock | 1.0 × 10−18 | [1] |
 |
CH3OH | Methanol | 9.74 | 1026 | C–O stretch | 1.8 × 10−17 | [1] |
 |
HCOOH | Formic acid | 8.22 | 1216 | C–O stretch | 2.9 × 10−17 | [1] |
 |
CH3CHO | Acetaldehyde | 7.41 | 1349 | CH3 s-def./CH wag. | 4.1 × 10−18(a) | [3] |
 |
CH3CH2OH | Ethanol | 7.23 | 1383 | CH3 s-def. | 2.4 × 10−18(a) | [4] |
 |
CH3OCHO | Methyl formate | 8.25 | 1211 | C–O stretch | 2.52 × 10−17(a) | [5] |
| 2.28 × 10−17(b) | [5] | ||||||
 |
CH3COOH | Acetic acid | 7.82 | 1278 | OH bend | 4.57 × 10−17 | [6] |
 |
HCOO- (B1) | Formate ion | 7.23 | 1383 | C–O stretch | 8.0 × 10−18 | [7] |
 |
HCOO− (B2) | Formate ion | 7.38 | 1355 | C–O stretch | 1.7 × 10−17 | [7] |
 |
OCN− | Cyanate ion | 7.62 | 1312 | Comb. (2v2) | 7.45 × 10−18 | [6] |
 |
CH3OCH3 | Dimethyl ether | 8.59 | 1163 | COC str. + CH3 rock. | 4.9 × 10−18(a) | [5] |
 |
CH3CN | Methyl cyanide | 7.27 | 1374 | CH3 sym. def. | 1.2 × 10−18(a) | [8] |
 |
CH3COCH3 | Acetone | 7.33 | 1363 | CCC asym. str. | 1.2 × 10−17(a) | [9] |
 |
CH3NH2 | Methylamine | 8.5 | 1176 | CH3 rock | 1.3 × 10−18(a) | [10] |
 |
NH2CHO | Formamide | 7.2 | 1388 | CH bend | 1.4 × 10−17(a) | [11] |
 |
HCOCH2OH | Glycolaldehyde | 7.3 | 1372 | CH bend | 7.7 × 10−18 | [12] |
References. [1] Bouilloud et al. (2015), [2] Boogert et al. (1997), [3] Hudson & Ferrante (2020), [4] Boudin et al. (1998), [5] Terwisscha van Scheltinga et al. (2021), [6] this work – see Appendix D. [7] Schutte et al. (1999), [8] Rachid et al. (2022), [9] Rachid et al. (2020), [10] Rachid etal. (2021), [11] Slavicinska et al. (2023), [12] Hudson etal. (2005).
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