Abstract

A series of N-t-butylimidoyl radicals, RĊNBut, have been prepared by the reaction of t-butoxyl radicals with the parent imines, RCHNBut, and their e.s.r. spectra have been recorded. The n.m.r. coupling constants, 3J(CH–CHNBut), in the imines are related to the e.s.r. hyperfine coupling constants, a(Hβ), in the imidoyl radicals by the expression a(Hβ)/G = 3.53 3J(CHCHNBut)/Hz – 8.48. A similar relationship has been identified previously between the aldehydes and the acyl radicals.These results are rationalised on the assumption that the radicals have a σ-electronic configuration, and that similar intramolecular interactions in the imines and imidoyl radicals impose on them similar conformations.

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