A study of the H-2 + H-2 reaction using a reduced dimensionality model and
a full dimensional quasiclassical trajectory treatment has been carried out
to investigate the validity of the model (already applied in the literatur
e for quantum calculations) and to compare dynamical outcomes of exchange a
nd dissociative mechanisms for elementary four-atom processes. (C) 1999 Els
evier Science B.V. All rights reserved.