To understand the implications of this we should first consider Of vicinal (adjacent) protons influences the field that the proton experiences. δ = 2.1 ppm, integration = 3H : agrees with - CH 3Ĭoupling arises because the magnetic field.δ = 5.9 ppm, integration = 1H deshielded : agrees with the - CHCl 2.Before we look at the coupling, lets review Protons, for example, see the spectra of 1,1-dichloroethane shown below. Peaks that appear as groups of peaks due to coupling with neighbouring Have all had different types of protons that are seen as singlets in So far the H-NMR spectra that we have looked at