A major prediction of Turin's vibration theory of olfaction is the isotope effect: that the normal and deuterated versions of a compound should smell different due to unique vibration frequencies, despite having the same shape.
The vibration theory received possible support from a 2004 paper published in the journal Organic Biomolecular Chemistry by Takane and Mitchell, which shows that odor descriptions in the olfaction literature correlate more strongly with vibrational frequency than with molecular shape [REF].