Question

How can their${}^{\mathbf{1}}\mathbf{H}$NMR spectra distinguish the following compounds?

Short answer

A)

B)

C)

Step-by-step solution

Step-by-Step SolutionStep 1: Signals in NMR Spectroscopy

The NMR signals indicate the different types of protons in a molecule.If the NMR spectra show six different peaks then it indicates that there are six different types of protons present.

Step 2:  H1NMR spectra for the molecules

In compound A , 1-Bromo nitrobenzene the compound shows four different signals. Two doublets and two doublets of doublets as shown below;

Compound ‘A’

In compound B , 3-Bromo nitrobenzene the compound shows four different signals. Two doublets, one singlet, and one doublet of doublets as shown below;

Compound ‘B’

In compound C , 4-Bromo nitrobenzene the compound shows two different signals. Two doublets as shown below;

Compound ‘C’