" /> Zucker–Hammett hypothesis - CISMeF





Preferred Label : Zucker–Hammett hypothesis;

IUPAC definition : This hypothesis states that, if in an acid catalysed reaction, log 10 k 1 (first-order rate constant of the reaction) is linear in H0 (Hammett acidity function), water is not involved in the transition state of the rate-controlling step. However, if log 10 k 1 is linear in log 10 H then water is involved. This has been shown to be incorrect by Hammett himself.;

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This hypothesis states that, if in an acid catalysed reaction, log 10 k 1 (first-order rate constant of the reaction) is linear in H0 (Hammett acidity function), water is not involved in the transition state of the rate-controlling step. However, if log 10 k 1 is linear in log 10 H then water is involved. This has been shown to be incorrect by Hammett himself.

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29/07/2025


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