Chemistry - Polymer Question with Solution | TestHub

The given polymer structure is $[-{\text{CH}}_2-\text{C}({\text{CH}}_3)=\text{CH}-{\text{CH}}_2-{]}_n$.

This is the structure of polyisoprene, which is commonly known as natural rubber.

The monomer used to form this polymer is isoprene (IUPAC name: 2-methyl-1,3-butadiene).

The structure of isoprene is ${\text{CH}}_2=\text{C}({\text{CH}}_3)-\text{CH}={\text{CH}}_2$. Upon addition polymerization, the double bonds rearrange to form the repeating unit shown in the question.

Answer: Isoprene