Which of the following can result in chain termination in cationic polymerization?
A)loss of H+
B)addition of a nucleophile that reacts with the propagating site
C)a chain transfer reaction with the solvent
D)a 1,2-hydride shift.
E)A,B,and C

Question

Quizplus · Accepted Answer

Loss of H+ (A) can result in chain termination as it removes the positive charge necessary for propagation. Addition of a nucleophile (B) can also terminate the chain as it reacts with the propagating site, preventing further elongation. A chain transfer reaction with the solvent (C) can also result in termination as the propagating site is transferred to the solvent molecule. 1,2-hydride shift (D) does not result in chain termination, as it only results in a change in the position of the positive charge and does not affect the overall length of the polymer chain. Therefore, the best choice for termination is E, which includes all three options that can result in chain termination.

Which of the Following Can Result in Chain Termination in Cationic