When a keto form undergoes a proton-transfer equilibrium an enol form is obtained. Suggest Corrections 17Similar questions Q. What are the conditions of Keto-Enol Tautomerism ? Q. What statement is correct for keto-enol tautomerism? Q. What is valence tautomerism? Q. What is gamma tautomerism...
1). Under neutral and acidic conditions, keto-enol equilibrium is a tautomerism, meaning that the keto and enol forms are separate, distinguishable by chemical and spectral methods and sometimes, isolable. In your example, you have three tautomers: a ketone, a less substituted enol and a more...
Equilibrium constants for keto–enol tautomerism of 2-, 3- and 4-phenylacetylpyridines in aqueous solution at 25 °C have been measured as pKTE = 3.35, 4.2 and 3.1 respectively (KTE = [enol]/[ketone], pKTE = –log KTE). Corresponding val... GM Mccann,RAM O'Ferrall,SM Walsh - 《...
Possible examples for such processes are proton shifts (keto-enol tautomerism), addition reactions, eliminations after protonation of the leaving group (HO−/DO−), or hydrogen atom (H·) abstraction reactions, which would all show a kinetic isotope effect. In particular the last alternative ...