Which of the following alkenes is most reactive , towards cationic polymerization?

Question

Which of the following alkenes is most reactive , towards cationic polymerization? (A)  CH2=CHCH3  (B)  CH2=CH-CH2OH  (C)  CH3-CO-CH3  (D)  CH2=CH-O-CH3

Tardigrade Admin · Accepted Answer

In cationic polymerization, carbocations are formed. Greater the stability of the carbocation, more reactive is the alkene. Since, the stability of the intermediate carbocation follows the order CH3- overset+ mathopC HC6H5>CH3- overset+ mathopC HCH3> CH3- overset+ mathopCH -Cl>CH3- overset+ mathopCHCO2CH3 Therefore, reactivity decreases in the same order. Thus, styrene is most reactive.

Q. Which of the following alkenes is most reactive , towards cationic polymerization?

$C H_{2} = C H C H_{3}$

$C H_{2} = C H - C H_{2} O H$

$C H_{3} - CO - C H_{3}$

$C H_{2} = C H - O - C H_{3}$

Q. Which of the following alkenes is most reactive , towards cationic polymerization?

CH2​=CHCH3​

CH2​=CH−CH2​OH

CH3​−CO−CH3​

CH2​=CH−O−CH3​

$C H_{2} = C H C H_{3}$

$C H_{2} = C H - C H_{2} O H$

$C H_{3} - CO - C H_{3}$

$C H_{2} = C H - O - C H_{3}$