Chapter 14, Problem 58DSP

Interpretation Introduction

Interpretation:

The chemical-shift assignments for the ring protons are to be identified.

Concept introduction:

Aromatic protons split each other and appear as a doublet or a doublet of doublets on the ${}^{\text{1}}\text{H NMR}$

spectrum.

The protons are deshielded if there is an electronegative atom in the vicinal position.

The coupling constant of protons which are ortho is between $\text{6-10Hz}$.

The coupling constant of protons which are meta is between $\text{1-3Hz}$.

The coupling constant of protons which are para is between $\text{0-1 Hz}$.