Chapter 14.11, Problem 13P

Interpretation Introduction

Interpretation:

The splitting pattern for the expected proton in each of the given molecule is to be described.

Concept introduction:

The ${}^{\text{1}}\text{H NMR}$ spectrum gives information about the various hydrogen atoms in a molecule.

The resonating frequency of a nucleus expressed with respect to the standard compound in a magnetic field which is defined to be at $\text{0}\text{ppm}$ is called chemical shift.

The chemical shift value of the non-equivalent protons is different.

The nonequivalent vicinal protons split the signal of each other, which is called spin-spin coupling.

The multiplicity of signal splitting in ${}^{\text{1}}\text{H NMR}$ spectroscopy is calculated by this equation:

${\text{Multiplicity of signal for H}}_{\text{a}}\text{ = n + 1}$

Here $\text{n}$ is the number of protons vicinal to ${\text{H}}_{\text{a}}$.

Multiplicity determines the number of neighboring nonequivalent protons.