This is crucial as the natural abundance of 13C is very low (about 1.109%) that usually makes 13C-NMR quite time-consuming. In fact, many NMR spectrometers below 100 MHz proton frequency do not even ...

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 ...

Common NMR active nuclei are 1H, 13C, 31P, 15N, 29Si, and many more. Nearly every element has at least one isotope that is NMR active. Since then, NMR spectroscopy has become an indespensible tool for ...