Search any question & find its solution
Question:
Answered & Verified by Expert
$\mathrm{CH}_{3} \mathrm{CH}_{2}$ Br undergoes Wurtz reaction. We may expect some of the following product
$\mathrm{A}: \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$
$\mathrm{B}: \mathrm{CH}_{2}=\mathrm{CH}_{2}$
$\mathrm{C}: \mathrm{CH}_{3}-\mathrm{CH}_{3}$
Select correct product.
Options:
$\mathrm{A}: \mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{3}$
$\mathrm{B}: \mathrm{CH}_{2}=\mathrm{CH}_{2}$
$\mathrm{C}: \mathrm{CH}_{3}-\mathrm{CH}_{3}$
Select correct product.
Solution:
2521 Upvotes
Verified Answer
The correct answer is:
$\mathrm{A}, \mathrm{B}$ and $\mathrm{C}$
$\mathrm{C}_{2} \mathrm{H}_{5} \mathrm{Br}+\mathrm{Na}^{*} \longrightarrow \mathrm{CH}_{3} \mathrm{CH}_{2}^{*}+\mathrm{NaBr}$
Intermediate free radical $\mathrm{CH}_{3} \mathrm{CH}_{2}^{*}$ combines to form $\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{CH}_{3}$ (as a main product) and also $\mathrm{CH}_{2}==\mathrm{CH}_{2}$ and $\mathrm{CH}_{3} \mathrm{CH}_{3}$ by disproportion
$$
\mathrm{CH}_{3} \mathrm{CH}_{2}^{*}+\mathrm{CH}_{3} \mathrm{CH}_{2}^{*} \rightarrow \mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{CH}_{3}
$$
n-butane
$$
\mathrm{CH}_{3} \mathrm{CH}_{2}^{*}+\mathrm{CH}_{3} \mathrm{CH}_{2}^{*} \longrightarrow \mathrm{CH}_{2}=\mathrm{CH}_{2}+\mathrm{CH}_{3}-\mathrm{CH}_{3}
$$
(disproportion reaction)
Intermediate free radical $\mathrm{CH}_{3} \mathrm{CH}_{2}^{*}$ combines to form $\mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{CH}_{3}$ (as a main product) and also $\mathrm{CH}_{2}==\mathrm{CH}_{2}$ and $\mathrm{CH}_{3} \mathrm{CH}_{3}$ by disproportion
$$
\mathrm{CH}_{3} \mathrm{CH}_{2}^{*}+\mathrm{CH}_{3} \mathrm{CH}_{2}^{*} \rightarrow \mathrm{CH}_{3} \mathrm{CH}_{2}-\mathrm{CH}_{2} \mathrm{CH}_{3}
$$
n-butane
$$
\mathrm{CH}_{3} \mathrm{CH}_{2}^{*}+\mathrm{CH}_{3} \mathrm{CH}_{2}^{*} \longrightarrow \mathrm{CH}_{2}=\mathrm{CH}_{2}+\mathrm{CH}_{3}-\mathrm{CH}_{3}
$$
(disproportion reaction)
Looking for more such questions to practice?
Download the MARKS App - The ultimate prep app for IIT JEE & NEET with chapter-wise PYQs, revision notes, formula sheets, custom tests & much more.