The 1 H-NMR signal at 3.38 ppm must be for hydrogens bound to the carbon which is in turn bound to the chlorine (we infer this because this signal is the furthest downfield in the spectrum, due to the...The 1 H-NMR signal at 3.38 ppm must be for hydrogens bound to the carbon which is in turn bound to the chlorine (we infer this because this signal is the furthest downfield in the spectrum, due to the deshielding effect of the electronegative chlorine). The proton spectrum tells us we have a methyl group (the 2.22 ppm singlet) that is not split by neighboring protons - this chemical shift value is in the range of a methyl group adjacent to a carbonyl.
