Single Molecule Tautomerization

Deuterium isotope effects on chemical shifts have been reported in P-diketones in which one ring is a pyridine and the other a phenyl ring leading to the establishment of tautomerism [50] and also in Schiff bases of l-hydroxy-2-naphthaldehyde again finding a tentative S-shaped curve [47]. [Pg.59]

X-ray and neutron diffraction techniques are the obvious choice with regard to solids. Two different situations are of interest for potentially tautomeric compounds in the solid. The first situation is to estabUsh the correct tautomer for compounds fully in one form. The other situation, in which the molecule is tautomeric in the solid, is more complicated. The main problem is that the signal of the X-ray techniques is averaged over time. [Pg.59]

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