Q4 / 180 · KCET 2013 · Chemistry
Cycloalkane formed when 1,4 -dibromopentane is heated with sodium is
- Correct answerAmethyl cyclobutane
- Bcyclopentane
- Ccyclobutane
- Dmethyl cyclopentane
Solution
When $\alpha, \omega$-dihalogen derivatives of the alkanes (say 1,4-dibromopentane) are treated with sodium or zinc, the corresponding cycloalkane is formed. The reaction undergoes free radical mechanism
On the other hand, $\alpha$, $\omega$-dihalogen derivatives of the alkanes in which the two halogen atoms are further apart than the 1,6-positions, do not form ring compounds but undergo the Wurtz reaction.
On the other hand, $\alpha$, $\omega$-dihalogen derivatives of the alkanes in which the two halogen atoms are further apart than the 1,6-positions, do not form ring compounds but undergo the Wurtz reaction.
Hence, the correct answer is option: 'A'.