Statistical analysis of the computational results (Table ) reveals the frequency of reactive sites follows the order B > I > G > C > J > F > N > E > A. While gas-phase ion generation energies are universally high and positive, as expected, comparison of ionization mechanisms shows Me -abstraction generally requires less energy than Me2Al + cleavage across all site types except A. However, the large standard deviations in these energies prevent drawing statistically significant conclusions about the preferred ionization mechanism.