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The intramolecular mechanism of the rearrangement of radicals PhCH2CH2CH(CF3)CH2ĊHCF3 (R1) to PhĊHCH2CH(CF3)CH2CH2CF3 (R2) with 1,5-hydrogen migration has been elucidated using EPR spectroscopy and the rate constant of isomerization kis = 5.0(± 0.3) x 104 s–1 at 22 °C has been determined.
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Gasanov et al. (1991) studied this question.
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