(Adapted from Omont & Bettinger 2021). Estimated orders of magnitude of reaction rates for a typical PAH/PAH⁺ of 50 C atoms in a diffuse interstellar cloud with n_HT = 50 cm⁻³, T = 50–100 K and UV intensity G₀ = 3 Habing. References for these rates are given in Table A.1 of Omont & Bettinger (2021), except for the rate of H accretion that has been slightly increased to match the adopted value of ∼1.4 × 10⁻¹⁰ cm³ s⁻¹ by Andrews et al. (2016) for any H-PAH⁺ accretion, assuming equal fractions of neutral and cation PAHs. While these rates have been estimated for typical PAHs, they should also apply to [C-PAH] complexes without much change, except for H-accretion that might proceed slightly faster (Appendix B.3).