Chapter 16, Problem 16.9P

Interpretation Introduction

Interpretation:

The difference between mesitylene $(1,3,5\text{-trimethylbenzene})$ and isopropylbenzene (cumene) by ${}^{13}\text{C}$ NMR spectroscopy is to be stated.

Concept introduction:

NMR spectroscopy is a technique used to determine a unique structure of the compounds. It identifies the carbon-hydrogen bonding of an organic compound. A hydrogen atom is known as a proton in the NMR spectroscopy.

The number of NMR signal in a compound is equal to the number of chemically non-equivalent protons present in that compound. The more the shielded proton, lesser will be its chemical shift value and the corresponding signal will be produced at the right-hand side or lower frequency region or vice versa.

The ${}^{13}\text{C}$ NMR spectroscopy is used to determine the number of equivalent and non-equivalent carbon atoms and to identify the type of carbon atoms present in the compound.