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Question

(D) The reaction involves the dehydrohalogenation of a vicinal dibromide using an excess of alcoholic $KOH$ (a strong base) under heating conditions.

Vedclass · Accepted Answer

$2-$Phenylhepta$-2,4-$diene

Vedclass · Answer

(D) The reaction involves the dehydrohalogenation of a vicinal dibromide using an excess of alcoholic $KOH$ (a strong base) under heating conditions. This is an $E2$ elimination reaction that proceeds twice to form a conjugated diene. The elimination occurs to form the most stable,highly substituted,and conjugated product. The structure formed is $2-$phenylhepta$-2,4-$diene,which is stabilized by conjugation with the phenyl ring and the double bonds.

The major product of the following reaction is $:$

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