Chapter 16, Problem 16.6P

Interpretation Introduction

(a)

Interpretation:

The isomers: $\text{mesitylene}\left(\text{1, 3, 5-trimethylbenzene}\right)$ and $p\text{-ethyltoluene}$, using NMR spectroscopy are to be differentiated.

Concept introduction:

The number of NMR signal in a compound is equal to the number of chemically non-equivalent protons present in that compound. The more the shielded proton less will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region or vice versa.

Interpretation Introduction

(b)

Interpretation:

The isomers: $\text{1-bromo-4-ethylbenzene}$ and $\left(\text{2-bromoethyl}\right)\text{benzene}\left({\text{BrCH}}_{\text{2}}{\text{CH}}_{\text{2}}\text{Ph}\right)$, using NMR spectroscopy are to be differentiated.

Concept introduction:

The number of NMR signal in a compound is equal to the number of chemically non-equivalent protons present in that compound. The more the shielded proton less will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region or vice versa.