Chapter 13, Problem 13.58AP

Interpretation Introduction

Interpretation:

The resonance signals of vitamin ${\text{D}}_{\text{3}}$ marked with asterisk ($*$) in the NMR spectrum is to be interpretated. The part of the structure they correspond to is to be identified.

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 the reference standard is known as the chemical shift of a nucleus. Tetramethylsilane (TMS) is taken as reference.