Determination de configuration de sulfoxydes cycliques par RMN discussion des differents criteres

The NMR spectra of various sulfoxides derived from thiophane or 4-tert-butyl thiacyclohexane are discussed. The different empirical rules commonly used to establish sulfoxides configuration (J_gem and Δν for an α-methylene group, syn-axial effect, benzene solvent shifts and Eu (dpm)₃ induced shifts) are critically examined, at the light of these experimental data. The conclusions of the NMR study agree with the structures obtained by X-ray analysis and chemical correlation.