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Grunwald-Winstein equation
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 k0 applies to the reference solvent (ethanol-water, 80:20, v/v) and ks to the solvent s, both at 25 oC. The parameter m is characteristic of the substrate and is assigned the value unity for tert-butyl chloride. The value Y is intended to be a quantitative measure of the ionizing power of the solvent s. The equation was later extended by Winstein, Grunwald and Jones (1951) to the form
where N is the nucleophilicity of the solvent and l its susceptibility parameter. The equation has also been applied to reactions other than solvolysis.
- Part of Speech: noun
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- Industry/Domain: Chemistry
- Category: Physical organic chemistry
- Organization: IUPAC
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