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

Options

A. a. `CH_(2)=CHCH_(3) `
B. b. `CH_(2)=CHCl `
C. c. `CH_(2)=CHC_(6)H_(5)`
D. d. `CH_(2)=CHCOOCH_(3)`

Answer

C

Explanation

In cationic polymerisation , carbocations are formed. Greater the stability of the carbocation , more reactive is the alkene. Since the stability of the intermediate cabocation follows the order : `CH_(3)-overset(+)CH_(6)H_(5) gt CH_(3) overset(+)CH_(3 ) gt CH_(3)overset(+)(C)HCl gt CH_(3)overset(+)CHCOOCH_(3)` therefore , reactivity decreases in the same order. Thus, styrene is mots reactive.