Most likely, the production of the 1,4-adduct yields a less-substituted alkene in this situation. Following the 1,2-adduct pathway ensures that the remaining double bond is stabilized by the peripheral methyl group (trisubstituted), rather than making the new double bond disubstitited.
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When 1,4-dimethylcyclohepta-1,3-diene is treated with HBr at elevated temperature, the 1,2-adduct predominates, rather than the 1,4-adduct, It ensures that the remaining double bond is stabilized by the peripheral methyl group (trisubstituted), rather than making the new double bond disubstitited.
A substitution reaction is a chemical reaction during which one functional group in a chemical compound is replaced by another functional group.
Substitution reactions are of prime importance in organic chemistry.
Therefore, When 1,4-dimethylcyclohepta-1,3-diene is treated with HBr at elevated temperature, the 1,2-adduct predominates, rather than the 1,4-adduct, It ensures that the remaining double bond is stabilized by the peripheral methyl group (trisubstituted), rather than making the new double bond disubstitited.
Learn more substituted reaction here ;
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