Chapter 12C, Problem 47P

Interpretation Introduction

Interpretation: The four constitutional isomers that have molecular formula ${\text{C}}_{\text{4}}{\text{H}}_{\text{9}}\text{Br}$ are to be drawn and the number of different kind of carbon atoms present in each isomer is to be indicated.

Concept introduction: Spectroscopy method is used to identify the structure of the molecule. It is based on the interactions between matter and electromagnetic radiations. ${}^{\text{13}}\text{C}$ NMR spectroscopy identifies the number of carbon atoms present in a molecule and the nature of the functional group. The number of chemical peaks depends upon the chemical environment around carbon atoms.