For fulvene in Fig. , a similar trend emerges where the off-diagonal initial conditions generate the most population contribution while the diagonal initial condition (i.e., P 00 ) does not. These trends apply to the final two molecular models as well. However, the off-diagonal contributions in the latter two molecules, [CH 2 NH 2 ] + and 1,2-dithiane, at long times, are negative, thereby diminishing the population generated by the P 11 contribution. In fact, the off-diagonal contributions present in the [CH 2 NH 2 ] + and 1,2-dithiane dynamics represent up to 20% and 10% at a long time. Furthermore, the ethylene and fulvene molecules exhibit periodic-like contributions from the off-diagonal initial conditions while the other two showcase non-periodic population dynamics. It was expected that the ethylene and [CH 2 NH 2 ] + partial contributions would look similar to one another due to the similarity of the non-adiabatic event present in each molecule, but this was not observed.