The addition of HI to the double bond of prop | vedclass

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(A) The reaction of $HI$ with propene $(CH_3-CH=CH_2)$ follows Markovnikov's rule. In the first step,the electrophile $H^+$ attacks the double bond to

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More stable carbocation

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(A) The reaction of $HI$ with propene $(CH_3-CH=CH_2)$ follows Markovnikov's rule. In the first step,the electrophile $H^+$ attacks the double bond to form a carbocation intermediate. Two possible carbocations can be formed: $CH_3-CH^+-CH_3$ (secondary carbocation) and $CH_3-CH_2-CH_2^+$ (primary carbocation). The secondary carbocation is more stable due to the inductive effect and hyperconjugation of the two adjacent methyl groups. Therefore,the reaction proceeds through the more stable carbocation to form isopropyl iodide $(CH_3-CH(I)-CH_3)$ as the major product.

The addition of $HI$ to the double bond of propene gives isopropyl iodide as the major product because the addition proceeds through:

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