Path orthogonal to the equipotential contours of a potential energy surface that
connects the energy minima through a saddle point
) from which
it slopes downwards along the steepest descending lines in
is the number of nuclei in the reacting system).
calculation allows the investigation of detailed changes
in molecular structure describing the transformation
of reactants to products.
PAC, 2007, 79, 293
(Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006))
on page 370
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. doi:10.1351/goldbook