  The vibrational predissociation of the Ne2Br2(B) van der Waals complex has
been investigated using the quasi-classical trajectory method (QCT), in the
range of vibrational levels v' = 16-23. Extensive comparison is made with the
most recent experimental observations [Pio et al., J. Chem. Phys. 133, 014305
(2010)], molecular dynamics with quantum transitions (MDQT) simulations [Miguel
et al., Faraday Discuss. 118, 257 (2001)], and preliminary results from
24-dimensional Cartesian coupled coherent state (CCCS) calculations. A
sequential mechanism is found to accurately describe the theoretical dynamical
evolution of intermediate and final product populations, and both QCT and CCCS
provide very good estimates for the dissociation lifetimes. The capabilities of
QCT in the description of the fragmentation kinetics is analyzed in detail by
using reduced-dimensionality models of the complexes and concepts from
phase-space transport theory. The problem of fast decoupling of the different
coherent states in CCCS simulations, resulting from the high dimensionality of
phase space, is tackled using a re-expansion scheme. QCT ro-vibrational product
state distributions are reported. Due to the weakness of the vdW couplings and
the low density of vibrational states, QCT predicts a larger than observed
propensity for \Delta v' = -1 and -2 channels for the respective dissociation
of the first and second Ne atoms.
