The signal for proton Ha (8 5.63 ppm in CD3CN) in the1H NMR spectrum for the macrocyclic diaryl ether to the right is almost 1 ppm more upfield than the

signal for proton H, (8 6.56 ppm in CD3CN). In the box below,provide a brief explanation for this difference, keeping in mind that the macrocylic ring is conformationally restricted (limited bond rotation).10 pts