Several tests about RPMD parameters: timestep, force constant, and child trajectories; anharmonic rotational constants for the stationary points. time, i.e., N(t)/N(0). The blue, red, and green points are for initial microcanonical ensembles at 6.505, 5.204 and 4.336 eV, respectively. The solid lines are the harmonic RRKM predictions. (b) Natural logarithm of the relative number of vibrationally excited CH3NC molecules vs. time, i.e., N(t)/N(0)