Chapter 12, Problem 12B.1BE

Interpretation Introduction

Interpretation:

The chemical shift of a peak in ${}^{\text{13}}\text{C}$ NMR at $125.148750\text{MHz}$ has to be calculated.

Concept introduction:

Many nuclei and electrons have spin, due to this spin magnetic moment arises.  The energy of this magnetic moment depends on the orientation of the applied magnetic field.  In NMR spectroscopy, every nucleus has a spin.  There is an angular momentum related to the spin.  The difference between its resonance frequency and that of reference standard is known as the chemical shift of a nucleus.  Tetramethylsilane (TMS) is taken as reference.