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Table A.2

Rate constants for reactions added on top of the UMIST database.

Reaction A B C Temperature range Reference

CH + CH + H 3.00(–11) 0.0 2.0 10.0–41 000.0 H17
CH + CH + H2 3.00(–11) 0.0 2.0 10.0–41 000.0 H17
H2O + O + H2 8.89(–11) 3.90 4.12 10.0–41 000.0 H17
H2O+ + O + H 5.00(–13) 0.0 2.0 10.0–41 000.0 H17
H2O+ + O+ + H2 5.00(–13) 0.0 2.0 10.0–41 000.0 H17
H3O+ + H2O + H+ 2.00(–11) 0.0 2.0 10.0–41 000.0 H17
H3O+ + OH + H 1.00(–11) 0.0 2.0 10.0–41 000.0 H17
H3O+ + H2O+ + H 2.00(–11) 0.0 2.0 10.0–41 000.0 H17
H3O+ + OH+ + H2 2.00(–11) 0.0 2.0 10.0–41 000.0 H17
SiOH+ + SiO+ + H 5.00(–11) 0.0 2.0 10.0–41 000.0 H17
NH+ + N+ + H 5.40(–11) 0.0 1.64 10.0–41 000.0 vD08
C+ + SiO SiO+ + C 5.40(–10) 0.0 0.0 10.0–41 000.0 TH85
H2 + H2 H2 + H + H 2.30(–11) 1.25 65 000.0 10.0–41 000.0 TH85
CO + H HCO 5.29(–34) 0.0 370.0 10.0–41 000.0 NIST

Notes. The coefficients A, B, and C have their usual meaning (see e.g., McElroy et al. 2013). The notation x(y) denotes x 10y.

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