File Name : figure_s1.tif Caption : example of experimental data and fitted peaks used for integration. bottom: residuals between experiment and fit. File Name : figure_s2.tif Caption : mass spectrum of tac^·+ dissociation with a mix of 5% acetylene instead of pure helium. the water addition product (m/z 320) is almost completely replaced by the acetylene addition product (m/z 328). File Name : figure_s3.tif Caption : zoomed in view of the hydrogen loss region from tac^·+. no significant hydrogen losses are observed. File Name : figure_s4.tif Caption : dissociation mass spectra for m/z 320. no dissociation is observed. File Name : figure_s5.tif Caption : integrated intensities of all mass peaks in the γ₉ region. File Name : figure_s6.tif Caption : integrated intensities of all mass peaks in the γ₁₀ region. File Name : figure_s7.tif Caption : integrated intensities of all mass peaks in the γ₁₁ region. File Name : figure_s8.tif Caption : integrated intensities of all mass peaks in the γ₁₂ region. File Name : figure_s9.tif Caption : integrated mass peaks for the γ₁₀ region for cor^·+ (top) and tac^·+ (bottom). File Name : figure_s10.tif Caption : integrated mass peaks for the γ₁₁ region for cor^·+ (top) and tac^·+ (bottom). File Name : figure_s11.tif Caption : integrated mass peaks for the γ₁₂ region for cor^·+ (top) and tac^·+ (bottom).