Above reaction is an example of 1,4-elimination predict the product.

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${CH}_{3} - {CH}_{2} - C \equiv CH$

${CH}_{3} - CH = C = {CH}_{2}$

${CH}_{3} - C \equiv C - {CH}_{3}$

$H_{2} C = CH - CH = {CH}_{2}$

answer is D.

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Detailed Solution

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Explanation:

1,4-Elimination Reaction:

In a 1,4-elimination reaction, a β-hydrogen and a leaving group are removed from non-adjacent carbons (positions 1 and 4).
This typically occurs in conjugated systems where double bonds can rearrange to form a conjugated diene as the final product.

Reaction Mechanism:

The elimination reaction removes a hydrogen atom from position 1 and a leaving group from position 4. This leads to the formation of a conjugated diene:

H₂C = CH − CH = CH₂

Product Prediction:

The final product is a conjugated diene:

H₂C = CH − CH = CH₂

Answer: The product of the reaction is d. H₂C = CH − CH = CH₂.

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