" /> Grunwald–Winstein equation - CISMeF





Preferred Label : Grunwald–Winstein equation;

IUPAC definition : The linear free energy relation: \[\log _{10}(\frac{k_{{s}}}{k_{0}}) m\ Y\] expressing the dependence of the rate of solvolysis of a substrate on ionizing power of the solvent. The rate constant k0 applies to the reference solvent (ethanol–water, 80:20, v/v) and ks to the solvent strong s /strong , both at 25 C. The parameter m is characteristic of the substrate and is assigned the value unity for i tert /i -butyl chloride. The value Y is intended to be a quantitative measure of the ionizing power of the solvents. The equation was later extended to the form: \[\log _{10}(\frac{k_{{s}}}{k_{0}}) m\ Y l\ N\] where N is the nucleophilicity of the solvent and l its susceptibility parameter. The equation has also been applied to reactions other than solvolysis.;

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The linear free energy relation: \[\log _{10}(\frac{k_{{s}}}{k_{0}}) m\ Y\] expressing the dependence of the rate of solvolysis of a substrate on ionizing power of the solvent. The rate constant k0 applies to the reference solvent (ethanol–water, 80:20, v/v) and ks to the solvent strong s /strong , both at 25 C. The parameter m is characteristic of the substrate and is assigned the value unity for i tert /i -butyl chloride. The value Y is intended to be a quantitative measure of the ionizing power of the solvents. The equation was later extended to the form: \[\log _{10}(\frac{k_{{s}}}{k_{0}}) m\ Y l\ N\] where N is the nucleophilicity of the solvent and l its susceptibility parameter. The equation has also been applied to reactions other than solvolysis.

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29/07/2025


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