A potential-energy surface
for a process A + B–C
in which the initial descent of the system into the product valley is associated
with a substantial decrease in the A–B
distance and with little separation between the products A–B
. In terms of a potential-energy profile
, the energy barrier occurs in the early stage of the reaction path
. Attractive surfaces are also called early-downhill surfaces, and the barrier in
such a surface is called a Type-I barrier.
PAC, 1996, 68, 149
(A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC
on page 153
IUPAC. Compendium of Chemical Terminology, 2nd ed. (the "Gold Book"). Compiled by
A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997).
XML on-line corrected version: http://goldbook.iupac.org (2006-) created by M. Nic,
J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https://doi.org/10.1351/goldbook