Chapter 12, Problem 12C.4DQ

Interpretation Introduction

Interpretation:

The origin of the nuclear Overhauser effect and the way in which it is used to identify the nearby protons in a molecule has to be discussed.

Concept introduction:

There is an angular momentum related to the spin.  The difference between its resonance frequency and that of the reference standard is known as the chemical shift of a nucleus.  Tetramethylsilane (TMS) is taken as reference.  Relaxation is the process by which the magnetization returns to its equilibrium value, at which point it is entirely along the $z-$ axis, with no $x-$ and no $y-$ component (no transverse components).