Table 1 Product ion counts with and without vibrational excitation for the SN2 and proton transfer reaction channels at a collision energy of 0.71 eV.
Counts (IRon)Counts (IRoff)(IRon-IRoff)Rel. differenceRelative rate increase*
SN2389,726388,5521174 ± 882(0.30 ± 0.23)%0.21 ± 0.16
Proton transfer1,191911280 ± 46(31 ± 5)%22 ± 4

*The rate increase is based on an excited fraction of (1.4 ±0.5)% (see the Materials and Methods section for details).