Mechanism of Keto-Enol Tautomerism of Ionized Vinyl Alcohol versus Acetaldehyde and their Dissociation to C2H3O烯 and H. An ab Initio Molec- ular Orbital Study. Int. J. Mass Spectrom. Ion Processes 1984, 59, 21-37.Apeloig, Y.; Karni, M.; Ciommer, B.; Depke, G.; Frenking, G.; ...
Keto–enol tautomerism in 2‐acetyltetralone: A reinvestigation The N-1 and C-13 NMR spectra of methyl (E)-2,3,-diphenylprop-2-enoate and methyl (E)-2-(2-phenylethenyl) benzoate resulting from the electrocyclic ring ope... EV Borisov,PK Agrawal - 《Magnetic Resonance in Chemistry》 被...
The Keto-Enol tautomerism process is assisted with a mediator His553. His64, His553 and His97 are found to have the function to stabilize the transition states and intermediates. His64 is a better candidate of B1 catalyst. His553 acts as a proton donor to protonate the carbonyl oxygen, ...
Our calculated results showthat the catalytic cycle consists of four stages: N–H deprotonationand C–H activation (<bold>Stage I</bold>), allene insertion,rearrangement and isomerization (<bold>Stage II</bold>), β-Helimination and enol–keto tautomerism (<bold>Stage III</bold>), and ...
I simply had noted "The phosphite ester salt is subject to keto-enol tautomerism and if the enol isomer is predominant the Perkow adduct is formed otherwise the keto form results in the Michaelis-Arbuzov adduct." in Wikipedia. The examples they had were from hexachloroacetone and another beta-...
2010): keto–enol tautomerism of the deiodination position and the phenol group in ortho activates the iodine, which is then attacked by a selenol (Fig. 2E). Resolution of the ketone eliminates a selenenyliodide. However, the reaction conditions in chloroform as solvent, at 50 °C, and ...
The reaction takes place in five steps, namely: (1) formation of a dimethylguanide–guanylhydrazone–acetylcarbinol adduct, (2) formation of a zwitterionic triazepine derivative by ring closure, (3) dehydration of this intermediate, (4) an imine–enamine tautomerism, (5) an enol–keto ...
Mechanism of the keto-enol tautomerism in radical cations and gas-phase closed-shell systemschemical equilibria, complexation equilibriaintermediates (and their reactionsNo abstract is available for this article.doi:10.1002/chin.198010061SPLITTER J. S....
Keto-Enol Tautomerism (isomeric reaction) cyclohexanone structure, that results shows that activation energy for this reaction equal 64.6143(kcal.mol) and transition state has the highest energy level equivalent whit -194354.27(kcal.mol) that due to breaking of C-H bond and composing of O-H bond...
Study of Mechanism Keto-Enol Tautomerism (isomeric reaction) structure Cyclohexanone by using DFT Method with NBO AnalysisReza Soleymani