## Wikipedia - Nucleophile (en) Wikipedia - Nucleófilo (gl) Wikipedia - Nukleofil (hu) Wikipedia - Нуклеофил (ru) Ritchie equation

https://doi.org/10.1351/goldbook.R05402
The @[email protected] $\log _{10}k_{\text{N}} = \log _{10}k_{0}+N_{\text{+}}$ applied to the reactions between nucleophiles and certain large and relatively @[email protected] organic cations, e.g. arenediazonium, triarylmethyl and aryltropylium cations in various solvents. $$k_{\text{N}}$$ is the @[email protected] for reaction of a given @[email protected] with a given nucleophilic system (i.e. given nucleophile in a given solvent). $$k_{0}$$ is the @[email protected] for the same @[email protected] with water in water, and $$N_{\text{+}}$$ is a parameter which is characteristic of the nucleophilic system and independent of the @[email protected] A surprising feature of the equation is the absence of a @[email protected] of $$N_{\text{+}}$$, characteristic of the substrate (cf. the $$s$$ in the @[email protected]), even though values of $$N_{\text{+}}$$ vary over 13 log units. The equation thus involves a gigantic breakdown of the @[email protected] The equation has been extended both in form and in range of application.
Source:
PAC, 1994, 66, 1077. (Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)) on page 1161 [Terms] [Paper]