“…The present observations are also compatible with the results of IR ion-dip experiments on phenyl-b-D D-glucopyranoside in the gasphase, 162,163,338 suggesting a population ratio g + /t/g À of 25:68:7 (the inversion between g + and t may be related to the presence of the phenyl substituent 162,163,338,348 ), as well as with Raman optical activity measurements on methyl-b-D D-glucopyranoside in vacuum, 340 suggesting a corresponding approximate population ratio of 50:50:0. For Man, the few quantummechanical studies available suggest a ranking g À > t > g + .…”