The linear
free energy relation:
expressing the dependence of the rate of
solvolysis of a substrate on
ionizing power of the solvent. The
rate constant
applies to the reference solvent (ethanol–water, 80:20, v/v) and
to the solvent
s, both at
. The parameter
is characteristic of the substrate and is assigned the value unity for
tert-butyl chloride. The value
is intended to be a quantitative measure of the
ionizing power of the solvents. The equation was later extended to the form:
where
is the
nucleophilicity of the solvent and
its susceptibility parameter. The equation has also been applied to reactions other
than
solvolysis.
Source:
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1118
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.
parameter