Table 3
Trans/cis ratio for HCOOH derived in the ISM compared with those predicted by this work for isomerization reactions.
| Source |  |
Observed trans/cis | Predicted trans/cis | Reference |
|---|---|---|---|---|
| (K) | (K1/K−1 at Tkin) | |||
| Barnard 5 | 5–15 | 15 | >1050 | (1) |
| L483 | 10 | 17 | 2 × 1088 | (2) |
| G31 | 150(b) | ≥90 | 8 × 105 | (3) |
| G+0.693-0.027 | 150(c) | ≥125 | 8 × 105 | (4) |
| W51 e2 | 90–180 | ≥16 | 7 × 109–8 × 104 | (5) |
Notes. (a) Tkin is the gas kinetic temperature of the sourceinferred from t-HCOOH. (b) This is an average kinetic temperature towards the G31 hot molecular core (e.g., Beltrán et al. 2018). (c) Inferred from CH3CN data by Zeng et al. (2018).
References. (1) Taquet et al. (2017); (2) Agúndez et al. (2019); (3) This work; (4) Rodríguez-Almeida et al. (2021); (5) Rivilla et al. (2017b).
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