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 and
C. 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.
Source:
PAC, 1996, 68, 149
(A glossary of terms used in chemical kinetics, including reaction dynamics (IUPAC
Recommendations 1996))
on page 153
Cite as:
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.
