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Standard XII

Chemistry

Reaction with Metals

Assertion : ...

Question

Assertion : $t$ -Butyl romide on reaction with sodium metal in dry ether gives $2, 2, 3, 3$ -tetramethyl butane Reason: $t$ -Alkyl halides readily undergo Wurtz reaction.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Both Assertion and Reason are incorrect

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Solution

The correct option is D Both Assertion and Reason are incorrect
When $t e r t$ -butylhalide are subjected to Wurtz reaction, isobutylene is formed as the major product. It is because the elimination is favored over $S_{N} 2$ mechanism. The $S_{N} 2$ step requires more activation energy due to steric hindrance.

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Assertion :t-Butyl romide on reaction with sodium metal in dry ether gives 2,2,3,3-tetramethyl butane Reason: t-Alkyl halides readily undergo Wurtz reaction.

The correct option is D Both Assertion and Reason are incorrectWhen tert-butylhalide are subjected to Wurtz reaction, isobutylene is formed as the major product. It is because the elimination is favored over SN2 mechanism. The SN2 step requires more activation energy due to steric hindrance.

Assertion : $t$ -Butyl romide on reaction with sodium metal in dry ether gives $2, 2, 3, 3$ -tetramethyl butane Reason: $t$ -Alkyl halides readily undergo Wurtz reaction.