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Note that the case of chiral, substituted cyclohexanes is very peculiar because the exchange rate between enantiomers can be determined without discriminating the enantiomeric forms. Indeed for these compounds, the interconversion between enantiomers also leads to the interconversion of diastereotopic directions (axial and equatorial bonds) that are nonequivalent in achiral LCs
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Note that the case of chiral, substituted cyclohexanes is very peculiar because the exchange rate between enantiomers can be determined without discriminating the enantiomeric forms. Indeed for these compounds, the interconversion between enantiomers also leads to the interconversion of diastereotopic directions (axial and equatorial bonds) that are nonequivalent in achiral LCs.
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This approach is called the coalescence temperature method
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This approach is called the "coalescence temperature method".
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c. and then determine the intersection point of the two plots.
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c. and then determine the intersection point of the two plots.
-
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56
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-
34250342323
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-
This implies that the coalescence phenomenon cannot be reached at 350 K and hence the data derived from the MMCs are consistent with the NMR results. At 350 K, the value of ΔG≠ determined from Equation (4, ΔG≠, 84.7 kJmol-1) is too high compared with the value calculated with Equation 6, ΔG≠, 70.9 kJmol-1
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