The chemical shifts (d) of solvent signals observed for 1 H NMR and 13 C NMR spectra are listed in the following table. The multiplicity is shown in parentheses as 1 for singlet, 2 for doublet, 3 for ...

The chemical shift of 1 H typically occurs in the range 0 to 14 ppm, whereas, the 13 C chemical shifts occur over much a larger range, typically 10 to 220 ppm. This dependence of the chemical shift ...

Two-dimensional NMR spectra have two frequency axes, which can correspond to like nuclei (i.e. 1H-1H) or different nuclei (i.e. 1H-13C), and a third dimension of peak intensity. More recently, NMR ...

The spectrum includes four separate proton environments. The chemical shift of the resonance at δ H 10.02 is significantly shifted downfield, and hence, is in the chemical shift range for a carboxylic ...

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