Question:
The major product of the following reaction is:
The major product of the following reaction is:
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In elimination reactions with excess base, the most stable conjugated diene product is favored due to its resonance stability.
Updated On: Feb 5, 2025
- 2-Phenylhepta-2,4-diene
- 6-Phenylhepta-3,5-diene
- 6-Phenylhepta-2,4-diene
- 2-Phenylhepta-2,5-diene
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The Correct Option is C
Solution and Explanation
The given reaction involves a dehydrohalogenation process, where a halogen (Br) is eliminated in the presence of an excess base, KOH in ethanol. This reaction typically leads to the formation of alkenes by the elimination of H and Br atoms.
Since the reagent is in excess, it leads to a conjugated diene product.
The elimination occurs in such a way that the resulting product has two double bonds conjugated with the phenyl group.
The correct product formed in this reaction is 6-Phenylhepta-2,4-diene, as it has the conjugation in positions 2 and 4.
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