This hypothesis states that, if in an acid catalysed reaction,
(first-order rate constant
of the reaction) is linear in
(Hammett acidity function
), water is not involved in the transition state
of the rate-controlling step
. However, if
is linear in
then water is involved.
This has been shown to be incorrect by Hammett himself.
PAC, 1994, 66, 1077
(Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994))
on page 1176
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