Quarterly Journal of the Chemical Society of London, Volume 1 |
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Page 102
... Thiophen By Anthony R. Butler and James B. Hendry , Department of Chemistry , St. Salvator's College , St. Andrews , Fife The kinetics of the nitration of thiophen and some substituted ... thiophen By ANTHONY R BUTLER and JAMES B HENDRY.
... Thiophen By Anthony R. Butler and James B. Hendry , Department of Chemistry , St. Salvator's College , St. Andrews , Fife The kinetics of the nitration of thiophen and some substituted ... thiophen By ANTHONY R BUTLER and JAMES B HENDRY.
Page 104
... thiophen nitration . TABLE 3 Activation parameters for the nitration of thiophen in sulphuric acid a Temp / ° C 25.0 19.9 13.9 9.2 102k ( obs . ) / 1 mol - 1 s - 1 66-43 % H2SO , 69.15 % H2SO 18.5 12.5 6.27 3.31 142 92.5 47.2 30.3 AS ...
... thiophen nitration . TABLE 3 Activation parameters for the nitration of thiophen in sulphuric acid a Temp / ° C 25.0 19.9 13.9 9.2 102k ( obs . ) / 1 mol - 1 s - 1 66-43 % H2SO , 69.15 % H2SO 18.5 12.5 6.27 3.31 142 92.5 47.2 30.3 AS ...
Page 105
... thiophen . These side reactions , 17 as well as the oxidation of a nitroso- to a nitro - com- pound , 21 result in the production of nitrous acid in an autocatalytic process . Now , heteroaromatic compounds are particularly susceptible ...
... thiophen . These side reactions , 17 as well as the oxidation of a nitroso- to a nitro - com- pound , 21 result in the production of nitrous acid in an autocatalytic process . Now , heteroaromatic compounds are particularly susceptible ...
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