Free radical addition to olefins. Part 8. - Addition of n-heptafluoropropyl radicals to fluoro-ethylenes

J. M. Tedder*, J. C. Walton, K. D.R. Winton

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

The light-induced addition of perfluoropropyl iodide to fluoro-ethylenes in the gas phase C3F7·+RCH=CH2→C 3F7CH2ĊHR (2) has been studied, and activation parameters determined by a competitive method. The corresponding differences found are: ΔE2(kcal mol-1) Δ(log A2)(l. mol-1 s-1) C*F2=CFH: C*FH=CF2 1.04±0.36 0.07±0.02 C*F 2=CH2:C*H2=CF2 5.52±1.06 -0.89±0.11 C*FH=CH2:C*H 2=CFH 2.25±0.66 0.18±0.06 C*H2=CFH: C*H2=CH2 0.79±0.43 0.09±0.04 C*H2=CF2:CH2=CH2 2.67±0.30 -0.66±0.02 C*FH=CF2:C*H 2=CF2 0.38±0.22 0.44±0.02 C*F 2=CF2:C*H2=CH2 4.67±1.50 -1.56±0.12. The most striking feature is the similarity to the results for addition of bromotrichloromethane to the same olefins. Relationships between activation energies and some theoretical quantities are discussed.

Original languageEnglish
Pages (from-to)160-166
Number of pages7
JournalJournal of the Chemical Society, Faraday Transactions 1: Physical Chemistry in Condensed Phases
Volume68
DOIs
Publication statusPublished - 1 Dec 1972

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