Chapter 12, Problem 12B.3P

Interpretation Introduction

Interpretation:

The ${}^{\text{19}}\text{F}$ NMR spectrum of two possible structures of ${\text{SF}}_{\text{4}}$ is to be described.

Concept introduction:

A technique used to detect fluorine containing compounds is ${}^{\text{19}}\text{F}$ NMR spectroscopy.  ${}^{\text{19}}\text{F}$ has spin $\text{I = }\frac{\text{1}}{\text{2}}$  and a high gyromagnetic ratio due to which it is highly responsive in NMR measurements.  The peaks in NMR spectroscopy are defined on the basis of chemical and magnetic equivalence.  Chemically equivalent nuclei are nuclei related by same symmetry element and magnetically equivalent nuclei are nuclei related by identical spin-spin interactions and if they are chemically equivalent.