Quarterly Journal of the Chemical Society of London, Volume 1 |
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Page 17
... exchange rates at 50 ° C ( cf. Figure 2 ) indicating that each of these compounds is undergoing exchange as the corre- sponding cation ( I , II , and III ) reacting with DO * . The slope magnitudes are similar to those found 26 for the ...
... exchange rates at 50 ° C ( cf. Figure 2 ) indicating that each of these compounds is undergoing exchange as the corre- sponding cation ( I , II , and III ) reacting with DO * . The slope magnitudes are similar to those found 26 for the ...
Page 132
... exchange under these conditions . The other exchange results have already been reported.17 No exchange took place with 3 - picoline methiodide and 0.1N - NaOD in D2O at 5 ° C ( pD = ca. 13 ) . At 26 ° C , exchange did take place at C ...
... exchange under these conditions . The other exchange results have already been reported.17 No exchange took place with 3 - picoline methiodide and 0.1N - NaOD in D2O at 5 ° C ( pD = ca. 13 ) . At 26 ° C , exchange did take place at C ...
Page 732
... exchange of ( II ) in [ 2H ] dimethyl sulphoxide - potassium t - butoxide . However , with the more direct observation allowed by use of 220 MHz n.m.r. , we found that 4 - exo - exchange in ( Ia ) occurred much more rapidly than 4 ...
... exchange of ( II ) in [ 2H ] dimethyl sulphoxide - potassium t - butoxide . However , with the more direct observation allowed by use of 220 MHz n.m.r. , we found that 4 - exo - exchange in ( Ia ) occurred much more rapidly than 4 ...
Contents
Physical organic chemistry | 1 |
Contents | 6 |
Kinetics and mechanism of electrophilic substitution of heteroaromatic compounds Part XXIV Acid | 11 |
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A2 mechanism 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 conjugate conjugate acid correlation deuterium diastereomers dienamines dioxan 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 n.m.r. spectra 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 sodium solution solvent steric steric effects structure studied substituent substituted substrate t-butyl Table temperature Tetrahedron thiophen trans triethylborane values