Quarterly Journal of the Chemical Society of London, Part 2, Pages 1-1256 |
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Page 128
... ring currents in furan and thiophen did not differ significantly from the benzene ring current . Since this Communication , Elvidge 8 has criticised this method of evaluating the ring currents in these compounds . By a different method ...
... ring currents in furan and thiophen did not differ significantly from the benzene ring current . Since this Communication , Elvidge 8 has criticised this method of evaluating the ring currents in these compounds . By a different method ...
Page 130
... rings compared to that in benzene , the equivalent dipole approximation is used . This gives : ( b ) The Determination of the Aromatic Ring Current from the Aromaticity Shift . — All previous determinations of the ring currents in the ...
... rings compared to that in benzene , the equivalent dipole approximation is used . This gives : ( b ) The Determination of the Aromatic Ring Current from the Aromaticity Shift . — All previous determinations of the ring currents in the ...
Page 131
... rings are 5-07 , 3-90 , and 3-26 Å2 , respectively ; thus to obtain the relative ring currents in furan and thiophen the observed ratios must be multiplied by the ratios of the areas of the rings . This gives ring currents in furan and ...
... rings are 5-07 , 3-90 , and 3-26 Å2 , respectively ; thus to obtain the relative ring currents in furan and thiophen the observed ratios must be multiplied by the ratios of the areas of the rings . This gives ring currents in furan and ...
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absorption alkaline alkyl Amer amine anhydride anion aqueous aromatic atom b₁ benzene bond boron trifluoride bromide calculated carbon tetrachloride cation Chem chemical shifts Chemistry chloride coefficient compounds concentration conformation corresponding cyclohexane decomposition derived diazotisation dimethylformamide dioxan dipole effect electron equation equilibrium ester ether experimental Figure first-order formamide fraction H₂O hydration hydrogen hydrogen-bonding hydrolysis hydroxide initial iodide ionisation isomer k₂ kcal ketone kinetic Le Fèvre magnetic resonance measurements methanol methoxide methyl methylene mixture molar Kerr constants mole mole-¹ molecular molecules nitrogen nitrosation nitrous nucleophilic observed obtained oxide oxime oxygen perchloric acid phenyl phosphate Phys polarisability protons pyridine R. J. W. Le Fèvre radical rate constants ratio reaction reactivity recrystallised ring shown sodium sodium hydroxide solution solvation solvent species spectra spectrum structure substituent sulphone Table temperature ultraviolet values