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KCET2013ChemistryHaloalkanes and Haloarenes

Cycloalkane formed when 1,4 -dibromopentane is heated with sodium is

Options

  1. Amethyl cyclobutane
  2. Bcyclopentane
  3. Ccyclobutane
  4. Dmethyl cyclopentane

Correct answer

A. methyl cyclobutane

Step-by-step solution

When , -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, , -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.

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