Abstract

The conformational analysis of substituted γ-lactones with vicinal hydrogen atoms is carried out by the MM2/3JHH tandem. The agreement between experimentally avaible and calculated data is globally correct (rms=1.16 Hz). A general preference for a hydroxyl group to occupy the equatorial position if it is on C-2 or the axial position if it is on C-3 or C-4 is observed as a consequence of the presence of H bond or of the gauche effect, respectively

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