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Table A.1.
Reactions involving CH2CCH, CH3CCH, and CH2CCH2 modified with respect to the UMIST RATE12 chemical network.
| Reaction | α (cm3 s−1) | β | γ (K) | Reference |
|---|---|---|---|---|
| CH + C2H4 → CH3CCH + H | 1.12 × 10−10 | 0 | 0 | Value at 23 K (Canosa et al. 1997); branching ratio (Goulay et al. 2009). |
| CH + C2H4 → CH2CCH2 + H | 2.74 × 10−10 | 0 | 0 | Value at 23 K (Canosa et al. 1997); branching ratio (Goulay et al. 2009). |
| C2H + CH3CHCH2 → CH2CHCCH + CH3 | 1.79 × 10−10 | 0 | 0 | Value at 79 K and branching ratio (Bouwman et al. 2012). |
| CH2 + C2H2 → CH2CCH + H | 2.00 × 10−11 | 0 | 3330 | Baulch et al. (2005). UMIST RATE12 incorrectly used expression for 1CH2. |
| C2 + CH4 → CH2CCH + H | 1.30 × 10−11 | 0 | 0 | Value at 24 K (Canosa et al. 2007). |
| C + C2H4 → CH2CCH + H | 3.10 × 10−10 | 0 | 0 | Value at 15 K (Chastaing et al. 1999); branching ratio (Bergeat & Loison 2001). |
| C2H + CH3 → CH2CCH + H | 1.00 × 10−10 | 0 | 0 | Loison et al. (2017). |
| C + CH3CCH → C4H3 + H | 2.47 × 10−10 | 0 | 0 | Value at 298 K (Loison & Bergeat 2004). |
| C + CH3CCH → C4H2 + H2 | 4.35 × 10−11 | 0 | 0 | Value at 298 K (Loison & Bergeat 2004). |
| C + CH2CCH2 → C4H2 + H2 | 2.70 × 10−10 | 0 | 0 | Value at 298 K (Loison & Bergeat 2004). |
| O + CH2CCH → C2H3 + CO | 2.30 × 10−10 | 0 | 0 | Value at 295−750 K (Slagle et al. 1991). The main likely product is HCCCHO |
| (see Loison et al. 2017), but it is not included in the network. | ||||
| N + CH2CCH → HC3N + H2 | 5.00 × 10−11 | 0 | 0 | Loison et al. (2017). |
| N + CH2CCH → C2H2 + HCN | 5.00 × 10−11 | 0 | 0 | Loison et al. (2017). |
| OH + CH2CCH → C2H3 + HCO | 6.00 × 10−11 | 0 | 0 | Loison et al. (2017). |
| OH + CH2CCH → C2H4 + CO | 6.00 × 10−11 | 0 | 0 | Loison et al. (2017). |
Notes. The rate coefficient is given by the expression k(T) = α(T/300)βexp(−γ/T), where T is the gas kinetic temperature in units of K.
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