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The elimination of HF from vibrationally excited fluoroethanes. The decomposition of 1,1,1-trifluoroethane-d0 and d3

✍ Scribed by G. O. Pritchard; M. J. Perona

Publisher
John Wiley and Sons
Year
1970
Tongue
English
Weight
836 KB
Volume
2
Category
Article
ISSN
0538-8066

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✦ Synopsis

The vibrationally excited molecules CF,CH,* and CF,CD,* have been synthesized by radical combination (produced by ketone photolysis), and HF and DF elimination from them studied as a function of temperature and pressure. Using RRK theory many calculations have recently been made of critical energies for the decomposition of "hot" fluoroethane molecules. Taking CF,CH,* as an example, it is concluded that the empiricism involved in such calculations renders results of doubtful significance. The non-equilibrium kinetic isotope effect is k,/k, = 3.1 at 470Β°K. Arrhenius parameters are also presented for radical abstraction reactions from the ketone source molecules.

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