Quarterly Journal of the Chemical Society of London, Volume 1 |
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Page 127
... substituent constants , o , which normally refer to reactions involving markedly smaller distances between the substituent X and the reaction site . This casts some doubt on the validity of treatments of substituent effects which ...
... substituent constants , o , which normally refer to reactions involving markedly smaller distances between the substituent X and the reaction site . This casts some doubt on the validity of treatments of substituent effects which ...
Page 399
... substituents are present are considered . With an electron - withdrawing group X as an example , resonance form ( I ) can be drawn for para - substituents , showing that the substituent can affect the electron density at the nitrogen ...
... substituents are present are considered . With an electron - withdrawing group X as an example , resonance form ( I ) can be drawn for para - substituents , showing that the substituent can affect the electron density at the nitrogen ...
Page 622
... substituent is no more deactivating than the meta - substituent and this is attributed to direct stabilisation through space of the electron - deficient reaction centre by the fluorine lone pair . The effect of the o - nitro- and o ...
... substituent is no more deactivating than the meta - substituent and this is attributed to direct stabilisation through space of the electron - deficient reaction centre by the fluorine lone pair . The effect of the o - nitro- and o ...
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