Nuclear magnetic resonance studies. III. Rotational isomerism of some C-glucosylflavonoid acetates
RA Eade, WE Hillis, DHS Horn and JJH Simes
Australian Journal of Chemistry
18(5) 715 - 721
The temperature-dependent variations in the spectra of certain C-glucosyl-flavonoid acetates are attributed to the effect of steric hindrance of bulky substituent groups of the sugar and aromatic moieties on the rate of interconversion of the two rotational isomers present. The differences in the chemical shifts of the protons of the two isomers are attributed to differences in the orientation and position of the acetyl and phenyl groups.
Full text doi:10.1071/CH9650715
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