Zobrazeno 1 - 10 of 57 pro vyhledávání: '"R. A. More O'Ferrall"'
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A pictorial representation of zero-point energy and tunnelling contributions to primary hydrogen isotope effects
Autor: R. A. More O'ferrall
Publikováno v: Journal of Physical Organic Chemistry. 23:572-579
The interpretation of primary hydrogen isotope effects in terms of isotopic sensitivities of zero-point energies in the reactants and transition state is reviewed. The reader is reminded that the transition state for a hydrogen transfer reaction corr
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::76616b0068c1d907abfc61667d9c9e4f
https://doi.org/10.1002/poc.1738
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4
Unexpectedly Small Ortho-Oxygen Substituent Effects on Stabilities of Benzylic Carbocations
Autor: AnnMarie C. O'Donoghue, R. A. More O'Ferrall, James R. Keeffe, Mizue Fujio
Publikováno v: Journal of the American Chemical Society. 126:9982-9992
Equilibrium constants are reported for the ionization of benzylic alcohols to carbocations stabilized by cyclic or acyclic o-alkyl or o-oxygen substituents. The measurements were stimulated by the observation of small or inverse effects of replacemen
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6c4fc2d071d8f4c564bfc4699f18c15e
https://doi.org/10.1021/ja030446q
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5
Estimation of a pKa for Protonated Dimethoxycarbene
Autor: W. E. Waghorne, R. A. More O'ferrall, I. Zrinski, J. P. Guthrie, A. C. O'Donoghue
Publikováno v: Journal of Physical Organic Chemistry. 16:582-587
A pK a is estimated for the protonation of dimethoxycarbene based on the relationship pK a =pK R -pK H 2 O , where K H 2 O and K R are equilibrium constants for hydration of the carbene and reaction of the dimethoxymethyl carbocation with water to fo
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::81db30727178b8ece6ced3dc2e5382ea
https://doi.org/10.1002/poc.663
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6
Rate and equilibrium constants for formation and hydrolysis of 9-formylfluorene oxime: diffusion-controlled trapping of a protonated aldehyde by hydroxylamine
Autor: D M O'Brien, D G Murphy, R. A. More O'ferrall
Publikováno v: Canadian Journal of Chemistry. 78:1594-1612
Equilibrium constants Kadd = 440 and Kox = 3.0 × 108 for formation of a carbinolamine adduct and oxime, respectively from 9-formylfluorene and hydroxylamine, and pKa = –1.62 for protonation of the oxime, have been evaluated at 25°C in aqueous solu
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a77f4b5bd3ea010aaae722d92491229e
https://doi.org/10.1139/v00-129
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