Which of the following monomers would be most reactive towards cationic polymerization?

Question

Quizplus · Accepted Answer

Monomer I has a tertiary carbon center, which is highly reactive towards cationic polymerization. Monomers II and III have secondary carbon centers, which are also reactive towards cationic polymerization, but not as much as tertiary centers. Monomer IV has a primary carbon center, which is not very reactive towards cationic polymerization. Monomer V has a double bond, which can undergo both cationic and radical polymerization, but the double bond is less reactive towards cationic polymerization compared to the tertiary carbon center in monomer I.

Which of the Following Monomers Would Be Most Reactive Towards