Disproportionation reactions between alkyl and fluoroalkyl radicals. V. Perfluoro‐n‐propyl and ethyl radicals revisited

摘要: A redetermination of the disproportionation/combination ratio for n–C3F7 and C2H5 radicals gives a value Δ(n–C3F7, C2H5) = 0.13 ± 0.01, independent temperature. The were produced by photolysis n–C3F7COC2H5. previous determinations this are discussed found to be largely incorrect. values Δ(CF3, Δ(C2F5, also re-evaluated, recommended 0.10 0.02 0.12 0.02, respectively. Systems involving perfluoroalkyl ethyl complicated due rapid perfluororadical addition ethylene formed in disproportionation process. extent reaction, its consequences, evaluated. role propionyl (C2H5CO) radical room temperature is assessed. However, it that Δ determined intercept method used work not affected secondary reactions occur. It concluded high cross-combination ratios general perfluoroalkyl-alkyl interactions. For C3F7 2.7–2.8. Above 100°C exceed 3 reactions.