The H + HCl and H + DCl reactions have been investigated with quasiclassica
l trajectory calculations performed on the ab initio G3 potential energy su
rface of Allison et al, [J. Phys. Chem. 100 (1996) 13575]. The cross-sectio
ns for the abstraction and exchange channels have been calculated for colli
sion energies from threshold to 2.4 eV. The role of initial rotation and vi
bration on reactivity is addressed and the results are compared to experime
ntal measurements and to previous theoretical calculations. (C) 1999 Elsevi
er Science B.V. All rights reserved.