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(A) In the electrophilic addition of $HBr$ to but$-1-$ene,the proton $(H^+)$ attacks the double bond to form a carbocation intermediate.Carbocation $A

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Carbocation $B$ is more stable and formed relatively at a faster rate.

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(A) In the electrophilic addition of $HBr$ to but$-1-$ene,the proton $(H^+)$ attacks the double bond to form a carbocation intermediate.Carbocation $A$ is a primary $(1^\circ)$ carbocation $(CH_3-CH_2-CH_2-CH_2^+)$,while carbocation $B$ is a secondary $(2^\circ)$ carbocation $(CH_3-CH_2-CH^+-CH_3)$.Secondary carbocations are more stable than primary carbocations due to the inductive effect and hyperconjugation.Because carbocation $B$ is more stable,its formation has a lower activation energy,meaning it is formed at a faster rate.

Choose the correct statement regarding the formation of carbocations $A$ and $B$ given:
$CH_3-CH_2-CH=CH_2 + HBr \to CH_3-CH_2-CH_2-CH_2^+ + Br^-$ $(A)$
$CH_3-CH_2-CH=CH_2 + HBr \to CH_3-CH_2-CH^+-CH_3 + Br^-$ $(B)$

Similar Questions

Which of the following is the most stable free radical?

Which of the following carbocations is the most stable?

State whether the following statements are True or False:
$(i)$ $CH_3-CH_2^+$ is more stable than $CH_3^+$
$(ii)$ $CH_3-CH_2^+$ is less stable than $CH_3^+$
$(iii)$ $(CH_3)_3C^+$ is less stable than $CH_3^+$
$(iv)$ $(CH_3)_3C^+$ is more stable than $CH_3^+$

Classify the following species into carbocation,free radical,and carbanion:
$CH_3^{\bullet}, CH_3^{+}, \bar{C}H_3, (CH_3)_3C^{\bullet}, (CH_3)_3C^{+}, (CH_3)_2CH^{+}, (CH_3)_3\bar{C}:, (CH_3)_3\ddot{C}H, C_6H_5CH_2^{\bullet}, CH_3\ddot{C}H_2, C_6H_5CH_2^{+}, CH_2=CHCH_2^{\bullet}, CH_2=CHCH_2^{+}$

Find out the number of $1-2-$shifts during the conversion of the given carbocation to the final alkene product.

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Choose the correct statement regarding the formation of carbocations $A$ and $B$ given:$CH_3-CH_2-CH=CH_2 + HBr \to CH_3-CH_2-CH_2-CH_2^+ + Br^-$ $(A)$$CH_3-CH_2-CH=CH_2 + HBr \to CH_3-CH_2-CH^+-CH_3 + Br^-$ $(B)$