Quarterly Journal of the Chemical Society of London, Volume 1 |
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Page 7
... proton occurred first , followed by that of the 8 - proton ( Figure 4 , B and C ) . Kinetic rates ( Table 1 ) were measured by integrating the area of the 5 - proton , and subsequently that of the 2-0- Cx hydrogen exchange , followed ...
... proton occurred first , followed by that of the 8 - proton ( Figure 4 , B and C ) . Kinetic rates ( Table 1 ) were measured by integrating the area of the 5 - proton , and subsequently that of the 2-0- Cx hydrogen exchange , followed ...
Page 8
... proton as a separate signal with all the others overlapped 7+ log k 3-0 --- 2-0 1-0 4.0 7 6.0 % 8-0 FIGURE 8 Rate profiles at 180 ° C for the hydrogen exchange of quinoline 1 - oxide : A , 8 - proton ; B , 5- and 6 - protons ; and ...
... proton as a separate signal with all the others overlapped 7+ log k 3-0 --- 2-0 1-0 4.0 7 6.0 % 8-0 FIGURE 8 Rate profiles at 180 ° C for the hydrogen exchange of quinoline 1 - oxide : A , 8 - proton ; B , 5- and 6 - protons ; and ...
Page 335
... proton resonance in the unprotonated amide is broadened by coupling to the NH protons and the NCH protons ; at higher acidities , in the protonation region , the formyl proton resonance sharpens owing to the loss of coupling across the ...
... proton resonance in the unprotonated amide is broadened by coupling to the NH protons and the NCH protons ; at higher acidities , in the protonation region , the formyl proton resonance sharpens owing to the loss of coupling across the ...
Contents
Physical organic chemistry | 1 |
Kinetics and mechanism of electrophilic substitution of heteroaromatic compounds Part XXIV Acid | 11 |
Contents iii | 16 |
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A2 mechanism absorption acetic acid-catalysed addition alcohol alkaline hydrolysis Amer analysis anion aqueous aromatic benzene benzoate bond bromine cal mol-1 calculated carbon atom carbonium ion carbonyl catalysis Chem Chemistry chlorine compounds concentration correlation deuterium diastereomers dienamines dioxan dioxan-water electron pairs energy entropies of activation epoxide equation esters ether ethylene exchange experimental Figure formation glycol H₂O hydrogen hydroxide hypochlorous acid indicate intramolecular isomer isotope effects k₁ k₂ ketone kinetic MeOH methanol methanolysis methiodide method methyl mixture mmHg mol-¹ molecular molecule n-pentyl nitration nucleophilic observed obtained olefin oxidation oxygen p-xylene parameters perchloric acid Phys polar positive proton R. J. W. Le Fèvre radical rate coefficients rate constants ratio reaction constant reactivity relative resorcinol ring silver perchlorate sodium solution solvent steric steric effects structure studied substituent substituted substrate sulphuric t-butyl Table temperature Tetrahedron thiophen trans triethylborane values