Chapter 9, Problem 26P

Interpretation Introduction

Interpretation:

A simple experiment to distinguish between two peaks of singlet and two peaks of doublet that arises from protons coupling with a single adjacent proton is to be determined.

Concept introduction:

Chemical shifts are the positions of signals along the x-axis in the nuclear magnetic spectroscopy. It gives an idea on how many different hydrogens are present in a given H-NMR for a particular compound.

The expression is as follows:

$\text{Number\hspace{0.17em}of\hspace{0.17em}peaks}=n+1$

Here, $n$ is the number of vicinal and geminal hydrogen atoms that are nonequivalent to the hydrogen atoms producing the signal.

The chemical shift of a proton is represented in hertz, which is proportional to the strength of the applied magnetic field;however, the distance between two single peaks of a doublet in hertz doesnot change because the magnitude of coupling constant and coupling constants are independent of the applied magnetic field.