Table 2
Rate coefficients expressed as k(T) = α (T/300)β exp (−γ/T) for neutral-neutral reactions involving silicon and sulphur.
| Index (a) | Reaction | α(cm−3s−1) | β | γ(K) | Description (b) |
|---|---|---|---|---|---|
| 1 | C + SiS → S + SiC | 1.20 × 10−9 | 0.020 | 23 261 | This work |
| −1 | S + SiC → C + SiS | 2.81 × 10−10 | −0.171 | −0.383 | This work |
| 2 | C + SiS → Si + CS | 1.59 × 10−9 | 0.0277 | 29.25 | This work |
| −2 | Si + CS → C + SiS | 5.74 × 10−9 | 0.389 | 12174 | This work |
| 3 | S + SiC → Si + CS | 3.20 × 10−10 | −0.152 | 2.073 | This work |
| −3 | Si + CS → S + SiC | 3.84 × 10−9 | 0.143 | 35 604 | This work |
| 4 | Si + HS → SiS + H | 0.916 × 10−10 | −0.6433 | 11.525 | QCT |
| −4 | SiS + H → Si + HS | 0 | 0 | 0 | Endo. |
| 5 | Si + H2S→ SiS+H2 | 1 × 10−10 | 0 | 0 | Exp |
| −5 | SiS + H2 → Si + H2S | 0 | 0 | 0 | Endo. |
| 6 | Si + SO → SiS + O | 1.77 × 10−11 | 0.16 | −20 | QCT |
| 7 | Si + SO → SiO + S | 1.53 × 10−10 | −0.11 | 32 | QCT |
| 8 | SiS + O → SiO + S | 9.53 × 10−11 | 0.29 | −32 | QCT |
| 9 | SiH + S → SiS + H | 0.63 × 10−10 | −0.11 | 11.6 | QCT |
| 9b | SiH + S → SH + Si | 0.025 ×10−10 | −0.13 | 9.38 | QCT |
| 10 | SiH + S2 → SiS + SH | 1 × 10−10 | 0 | 0 | PES |
| 11 | Si + SO2 → SiO + SO | 1 × 10−10 | 0 | 0 | PES |
| 12 | SiS + O2 | 0 | 0 | 0 | Endo |
Notes.(a) Negative numbers indicate the inverse reactions.(b) References and description of the approaches used to obtain the results: QCT stands for “computed by quasiclassical trajectories simulations” (Zanchet et al. 2018; Mota et al. 2022; Galvão et al. 2023); Exp. stands for “inferred from experiments” (Doddipatla et al. 2021); PES stands for “inferred from the absence of a potential energy barrier” (Rosi et al. 2018; Campanha et al. 2022); Endo. stands for “considered not to occur due to endoergic character” (Rosi et al. 2018; Paiva et al. 2020; Campanha et al. 2022).
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