At low temperatures,the slow addition of mole | vedclass

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Question

(B) The electrophilic addition of bromine $(Br_2)$ to a molecule containing both a double bond and a triple bond is governed by the relative reactivit

Vedclass · Accepted Answer

$BrCH_2-CHBr-CH_2-C \equiv CH$

Vedclass · Answer

(B) The electrophilic addition of bromine $(Br_2)$ to a molecule containing both a double bond and a triple bond is governed by the relative reactivity of the pi bonds. The double bond is more electron-rich and nucleophilic than the triple bond. Consequently,the electrophilic bromine atom attacks the double bond first to form a more stable cyclic bromonium ion intermediate. Therefore,the addition occurs selectively at the $CH_2=CH-$ site,resulting in the product $BrCH_2-CHBr-CH_2-C \equiv CH$.

At low temperatures,the slow addition of molecular bromine to $CH_2=CH-CH_2-C \equiv CH$ gives :-

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