Comparison between Chemical Shifts and Coupling Constants

3 Comparison between Chemical Shifts and Coupling Constants 

Chemical shifts depend on the strength of the applied magnetic field B0 according to eq. (1.8 c) when measured on the frequency scale. Coupling constants remain constant when the strength of the magnetic field BQ changes. 

Because of intramolecular mobility (rotations, inversions) and intermolecular interactions, chemicals shifts depend on temperature, solvent, and concentration. Coupling constants, however, for the most part do not depend on these conditions. 

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