Quarterly Journal of the Chemical Society of London, Volume 1 |
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Page 60
... mechanism would demand an unstable primary carbonium ion , CH2 + CH2OH , and where it would be more reasonable to expect an A2 mechanism , but the value of AS obtained was −6 · 1 cal mol - 1 K - 1 . This small difference in values does ...
... mechanism would demand an unstable primary carbonium ion , CH2 + CH2OH , and where it would be more reasonable to expect an A2 mechanism , but the value of AS obtained was −6 · 1 cal mol - 1 K - 1 . This small difference in values does ...
Page 65
... mechanism for reactions with alcohols as solvent N. B. Chapman , M. G. Rodgers , and J. Shorter , J. Chem . Soc ... A2 - 24.0 a o - Methylbenzoic acid MeOH 40 A2 -29.6 o - Chlorobenzoic acid MeOH 40 42 -27.9 Phenylacetic acid MeOH 30 A2 ...
... mechanism for reactions with alcohols as solvent N. B. Chapman , M. G. Rodgers , and J. Shorter , J. Chem . Soc ... A2 - 24.0 a o - Methylbenzoic acid MeOH 40 A2 -29.6 o - Chlorobenzoic acid MeOH 40 42 -27.9 Phenylacetic acid MeOH 30 A2 ...
Page 68
... mechanism , and are very similar to those for hydrolyses.1 Thus reactions following an A2 mechanism generally have AS + values in the range -17 to -35.7 cal mol - 1 K - 1 while reactions following an Al mechanism generally have AS ...
... mechanism , and are very similar to those for hydrolyses.1 Thus reactions following an A2 mechanism generally have AS + values in the range -17 to -35.7 cal mol - 1 K - 1 while reactions following an Al mechanism generally have AS ...
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