The bond dissociation energy of the C-H bond in ethanol. A kinetic study of the reaction i2 + ethanol

Ze'ev B. Alfassi, David M. Golden

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34 Scopus citations

Abstract

The reaction of iodine with ethyl alcohol has been studied in a static system in the temperature range 203-252° and in the pressure range 30-750 Torr. The rate-determining step of this reaction has been found to be I + CH3CH2OH →1 CH3ĊHOH + HI and k1 is given by the equation log (k1/M-1 sec-1) = (11.5 ± 0.3) - (22.7 ± 0.6)/θ, θ = 2.303RT kcal mol-1. From the activation energy and the assumption E-1 = 1 ± 1 kcal mol-1, it has been calculated that D[CH3CH(OH)-H] = 93.0 ± 1.0 and ΔHf°(CH3ĊHOH,g) = -15.2 ± 1.0 kcal mol-1. The data of the reaction I2 + CH3OH are reinterpreted, increasing log A by 0.3.

Original languageEnglish
Pages (from-to)3314-3319
Number of pages6
JournalJournal of Physical Chemistry
Volume76
Issue number23
DOIs
StatePublished - 1 Jan 1972
Externally publishedYes

ASJC Scopus subject areas

  • Engineering (all)
  • Physical and Theoretical Chemistry

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