Figure 4. able with their predicted splitting patterns. The spectra of m-and p-nitroacetanilide in the same region are also pictured for comparison. Comparing the spectra of the 0-, m-, and p-nitroacetanilides, it can be seen that Ha in the ortho compound is the most deshielded aromatic proton not only in that molecule but in any compound of the series. This phenomenon has been observed for other substituents in monosubstituted ac ylamines.
