Reaction of Alcohol Dehydration by Polyphosphoric Acid

Тип публикации: статья из журнала

Год издания: 1996

Аннотация: Dehydration of seven alcohols C2-C4 in a solution of polyphosphoric acid (82.3% P2O5) is studied. The reaction is shown to proceed according to the pseudo-first order rate law, and the reactivity of the alcohols is formally described by either the Taft equation logkapp = 4.79 - 0.82?n - 10.3?* (correlation coefficient r = 0.95, ?n is the number of hydrogen atoms that participate in hyperconjugation) or by the equation logkcorr = -5.76 - 13.0?p (r = 0.94). The conclusion is drawn that the reaction proceeds via the transition state in which a significant charge separation takes place. The experimental data are best described if one suggests that the transition complex has a structure close to that of the ?-complex of hydrogen with the double bond of an olefin.

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Издание

Журнал: Kinetics and Catalysis

Выпуск журнала: Vol. 37, Is. 6

Номера страниц: 780-785

ISSN журнала: 00231584

Авторы

  • Vereshchagin S.N.
  • Kirik N.P.
  • Shishkina N.N.
  • Anshits A.G.
  • Vereshchagin S.N. (Inst. Chem. of Nat. Organ. Raw Mat.,Russian Academy of Sciences,Siberian Division)
  • Kirik N.P. (Inst. Chem. of Nat. Organ. Raw Mat.,Russian Academy of Sciences,Siberian Division)
  • Shishkina N.N. (Inst. Chem. of Nat. Organ. Raw Mat.,Russian Academy of Sciences,Siberian Division)
  • Anshits A.G. (State Technical University)

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