Quarterly Journal of the Chemical Society of London, Volume 1 |
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Page 102
... thiophen . Nitration of thiophen , with a solution of nitric acid in acetic acid , proceeds with explosive violence owing to the easy nitrosation of thiophen in an autocatalytic reaction , leading to a variety of unidentified products ...
... thiophen . Nitration of thiophen , with a solution of nitric acid in acetic acid , proceeds with explosive violence owing to the easy nitrosation of thiophen in an autocatalytic reaction , leading to a variety of unidentified products ...
Page 104
... thiophen nitration . TABLE 3 Activation parameters for the nitration of thiophen in sulphuric acid " Temp / ° C 25.0 19.9 13.9 9.2 102k2 ( obs . ) / 1 mol - 1 s - 1 66-43 % H2SO , 18.5 12.5 6.27 3.31 69.15 % H2SO 142 92.5 47.2 30.3 ...
... thiophen nitration . TABLE 3 Activation parameters for the nitration of thiophen in sulphuric acid " Temp / ° C 25.0 19.9 13.9 9.2 102k2 ( obs . ) / 1 mol - 1 s - 1 66-43 % H2SO , 18.5 12.5 6.27 3.31 69.15 % H2SO 142 92.5 47.2 30.3 ...
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 |
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