| Résumé | An EPR spectroscopic study of the CF3N(Ȯ)OC(CH3)3 radical reveals that the rotation of the CF3 group is restricted, which provides additional support for the view that alkoxy alkyl nitroxides are less planar at nitrogen than dialkyl nitroxides. The rotation of the CF3 group can be described by the Arrhenius equation with log (A/s-1) = 13.0 ± 0.3 and Ea = 14.1 ± 0.9 kJ mol-1. At 104 K the individual F hyperfine splittings are +19.97, -2.29, and -0.89 G. It is suggested that negative spin reaches the fluorines by a combination of a through-bond spin polarization and a 1,3 p-p interaction. © 1982 American Chemical Society. |
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