Table 1
Computed relative stabilities and energy ranking with respect to the isomer of minimum energy of same formula ΔE (a) (kcal mol−1), dipole moments μ (a) (Debye), and adsorption energies of detected molecules on water ice EAds (b) (kcal mol−1) of chiral (*) propylene oxide and low energy isomers.
| Ranking | Isomer | ΔE | μ | EAds | Spectra |
|---|---|---|---|---|---|
| 1 |  |
0.0Obs | 3.1 | 6.0 | Mil |
| 2 |  |
7.1Obs | 2.8 | 11.6 | Mil |
| 3 |  |
11.7 | 0.5 | NA | |
| 4 |  |
15.9 | 1.4 | NA | |
| 5 |  |
21.9 | 1.6 | Mil | |
| 6 |  |
28.0 | 1.5 | MW | |
| 7 |  |
28.6 | 1.7 | Mil | |
| 8 |  |
29.9*,Obs | 2.0 | 10.6 | Mil |
Notes. Spectral signatures are noted MW (microwave) and Mil (millimetric) or NA (not available).The molecules identified in the ISM are noted (Obs). (a) Energy differences and dipole moments taken from Karton & Talbi (2014); (b)this work.
References. Corresponding to ranking orders (1) Groner et al. (2008); (2) Zingsheim et al. (2017); (3) not available; (4) not available; (5) Melandri et al. (1994); (6) McDonald et al. (1978); (7) Daly et al. (2014); (8) Mesko et al. (2017).
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