Techniques For Study of Conformational Isomerism
Most information on conformational isomerism comes from single crystal X-ray diffraction studies. IR spectroscopy is ordinarily used to measure conformer ratios. For the axial and equatorial conformer of bromocyclohexane, νCBr differs by almost 50 cm−1.
The dynamics of conformational (and other kinds of) isomerism can be monitored by NMR spectroscopy at varying temperatures. The technique applies to barriers of 8-14 kcal/mol, and species exhibiting such dynamics are often called "fluxional".
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