Quarterly Journal of the Chemical Society of London, Volume 6 |
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Page 1587
... energy transition - state necessitated by an orbital - symmetry forbidden disrotatory ring - opening led us to consider whether internal factors might modify its electronic structure and so reduce the activation energy . A rather ...
... energy transition - state necessitated by an orbital - symmetry forbidden disrotatory ring - opening led us to consider whether internal factors might modify its electronic structure and so reduce the activation energy . A rather ...
Page 1589
... energy ( kcal . mole " ) 3 2.0- но On = 122 ° H ... H en = 110 ° 0 4 8 12 16 ° Angle strain 0-0 ° , activation energy of over 6 kcal . mole - 1 between the fastest ( II ) and slowest ( III ) reactants and it was felt at first that ...
... energy ( kcal . mole " ) 3 2.0- но On = 122 ° H ... H en = 110 ° 0 4 8 12 16 ° Angle strain 0-0 ° , activation energy of over 6 kcal . mole - 1 between the fastest ( II ) and slowest ( III ) reactants and it was felt at first that ...
Page 1676
... energy . The x - electron calculation favours a planar or partially twisted geometry . Non- bonded interactions must be added on as a further energy component , and they will favour the twisted geometry . An extended Hückel calculation ...
... energy . The x - electron calculation favours a planar or partially twisted geometry . Non- bonded interactions must be added on as a further energy component , and they will favour the twisted geometry . An extended Hückel calculation ...
Contents
ISOWA 013 | 1034 |
Physical organic chemistry | 1035 |
Studies of the reactions of the anhydrosulphites of ahydroxycarboxylic acids Part IV Steric | 1044 |
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2,4-dinitrophenyl absorption acetic acid aci-anion acid anhydrosulphite adducts alcohol aluminium hydride Amer amines aqueous aromatic atom attack bands benzene benzophenones benzyl bond calculated carbon tetrachloride carbonyl catalysis Chem chloride compounds concentration conformation corresponding decomposition dioxan dipole effect electron electrophilic equation ester ethanol ether ethylene experimental Figure first-order formation hydrogen hydrolysis hydroxide hydroxyl interaction ionic strength isomer k₁ k₂ ketone kinetic leaving group measured mechanism methyl methyl phosphate mixture molar Kerr constants mole mole-¹ molecular molecules nitrogen nitromethane NO₂ nucleophilic observed obtained oxidation oxyanions peroxide persulphate phenyl phenylacetic acid phosphate plots polarisability proton pyridine R. J. W. Le Fèvre R. O. C. Norman radical anion rate constants ratio reaction reactivity rearrangement reduction ring rotation similar sodium solution solvent solvolysis spectra spectrum splitting constants steric structure substituent sulphate radical anion Table temperature tetraphenylallene thiophen titanium(III values Δε ΣΔε/Σω