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Question
Write the structure of isoprene and the polymer obtained from it.
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Solution
1) Isoprene:
\[\begin{array}{cc}\ce{H2C = C - C = CH2}\\
|\phantom{....}|\\\ce{\underset{(isoprene)}{CH3 H}}\end{array}\]
2) Polymer of isoprene (polyisoprene or natural rubber):
\[\begin{bmatrix}\begin{array}{cc}\ce{H\phantom{............}}\ce{H}\\
|\phantom{.............}|\\\ce{- C - C = C - C -}\\
|\phantom{....}|\phantom{....}|\phantom{....}|\\
\phantom{.}\ce{H}\phantom{...}\ce{CH3}\phantom{.}\ce{H}\phantom{...}\ce{H}\phantom{.}\\
\end{array}\end{bmatrix}_\text{n}\]
(polyisoprene/rubber)
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