parahadi

H-3 and H. Case b assuming chemical shift differences much larger than coupling constants. Aromatics Each reaction yields a disubstituted benzene as the organic product which can be identified using the descriptors ortho meta and para see ortho carbon. H nmr benzena orto meta para . The hydrogen at the para-position of the benzene ring is unaffected by coupling. For meta- there should be three signals. The closer the proton is to the other hydrogen atoms the greater the effect on the proton. So we can ignore it but we need to understand how the proton hydrogen shows up in the ortho and meta positions. The samples were run using CDCl 3 as the solvent and a small contaminant of this deuterated solvent is CHCl 3 which shows up at 724 ppm. Below is a set of simulations for a generic para disubstituted benzene system which is an AABB system. 3132008 If you consider ortho-dichlorobenzene you would observe two signals in the 1H-NMR because there are two magnetically dist...