The species which can best serve as an initiator

Question:

The species which can best serve as an initiator for the cationic polymerization is :-

  1. BuLi

  2. $\mathrm{LiAlH}_{4}$

  3. $\mathrm{HNO}_{3}$

  4. $\mathrm{AlCl}_{3}$


Correct Option: , 4

Solution:

Electron - deficient species (Lawis acid) like $\mathrm{AlCl}_{3}, \mathrm{BF}_{3}$ etc. are is used as initiator for cationic polymerisation.

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