91Ó°ÊÓ

The ${}^{13}C$NMR spectrum is very useful to determine the patterns of substitution in the disubstituted benzene molecules.

The only difference between the ${}^{13}C$NMR and the NMR spectroscopy is that the ${}^{\mathbf{13}}\mathit{C}$NMR is used to determine the number and the type of carbon atoms in an organic molecule, whereas the NMR spectroscopy is used to determine the number and the type of the hydrogen atoms in an organic molecule.

4-methyl isopropyl benzene

The seven peaks will be observed for the above molecule in the ${}^{13}C$NMR spectrum as shown in the structure below:

Seven lines for the above structure

3-nitro-5-bromo phenol

There will be six lines observed in the ${}^{13}C$NMR spectrum of the above molecule. The number of peaks is shown below:

Six lines for the above structure