<\/div> or

<\/div> applied to the influence of *meta<\/i>- or **para<\/i>-substituents X on the reactivity of the functional group<\/a> Y in the benzene derivative **m<\/i>- or **p<\/i>-XC*_{6<\/sub>H4<\/sub>Y<\/span>. <\/span> or <\/span> is the rate or }*equilibrium constant<\/a>, respectively, for the given reaction of **m<\/i>- or **p<\/i>-XC*_{6<\/sub>H4<\/sub>Y<\/span>; <\/span> or <\/span> refers to the reaction of C6<\/sub>H5<\/sub>Y<\/span>, i.e. X<\/span> = H<\/span>; is the substituent constant characteristic of m<\/i>- or p<\/i>-X<\/span>: is the reaction constant characteristic of the given reaction of Y. The equation is often encountered in a form with <\/span> or <\/span> written as a separate term on the right hand side, e.g. <\/div> or <\/div> It then signifies the intercept corresponding to X<\/span> = H<\/span> in a regression of <\/span> or <\/span> on .","text":"The equation in the form: [math: log 10 ( k k 0 ) = ρ σ] or [math: log 10 ( K K 0 ) = ρ σ] applied to the influence of meta- or para-substituents X on the reactivity of the functional group Y in the benzene derivative m- or p-XC6H4Y. [math: k] or [math: K] is the rate or equilibrium constant, respectively, for the given reaction of m- or p-XC6H4Y; [math: k0] or [math: K0] refers to the reaction of C6H5Y, i.e. X = H; is the substituent constant characteristic of m- or p-X: is the reaction constant characteristic of the given reaction of Y. The equation is often encountered in a form with [math: log 10 k 0] or [math: log 10 K 0] written as a separate term on the right hand side, e.g. [math: log 10 k = ρ σ + log 10 k 0] or [math: log 10 K = ρ σ + log 10 K 0] It then signifies the intercept corresponding to X = H in a regression of [math: log 10 k] or [math: log 10 K] on [math: σ].","contexts":{"in":[],"of":[]},"chemicals":[],"links":[{"type":"seealso","url":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/V05019"},{"type":"seealso","url":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/C05438"},{"type":"seealso","url":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/T06247"},{"type":"seealso","url":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/Y06734"},{"type":"goldify","url":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/F02555"},{"type":"goldify","url":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/E02177"}],"math":[{"meaning":null,"type":null,"latex":"\\log _{10}(\\frac{k}{k_{0}}) = \\rho \\ \\sigma "},{"meaning":null,"type":null,"latex":"\\log _{10}(\\frac{K}{K_{0}}) = \\rho \\ \\sigma "},{"meaning":null,"type":null,"latex":"k"},{"meaning":null,"type":null,"latex":"K"},{"meaning":null,"type":null,"latex":"k_{0}"},{"meaning":null,"type":null,"latex":"K_{0}"},{"meaning":null,"type":null,"latex":"\\log _{10}k_{0}"},{"meaning":null,"type":null,"latex":"\\log _{10}K_{0}"},{"meaning":null,"type":null,"latex":"\\log _{10}k = \\rho \\ \\sigma +\\log _{10}k_{0}"},{"meaning":null,"type":null,"latex":"\\log _{10}K = \\rho \\ \\sigma +\\log _{10}K_{0}"},{"meaning":null,"type":null,"latex":"\\log _{10}k"},{"meaning":null,"type":null,"latex":"\\log _{10}K"},{"meaning":null,"type":null,"latex":"\\sigma "}],"sources":["PAC, 1994, 66, 1077. 'Glossary of terms used in physical organic chemistry (IUPAC Recommendations 1994)' on page 1119 (https:\/\/doi.org\/10.1351\/pac199466051077)"]}]},"referencedin":[{"title":0,"url":"https:\/\/en.wikipedia.org\/wiki\/Hammett_equation","source":"wikipedia"}],"links":{"html":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/H02732\/html","json":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/H02732\/json","xml":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/H02732\/xml","plain":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/H02732\/plain","pdf":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/H02732\/pdf","originalpdf":"http:\/\/iupac.org\/goldbook\/H02732.pdf"},"citeas":"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.","license":"Licensed under Creative Commons Attribution-NoDerivatives (CC-BY-ND) 4.0 International (https:\/\/creativecommons.org\/licenses\/by-nd\/4.0\/)","disclaimer":"The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.","accessed":"2019-02-20T11:21:13-06:00"}}}