Chapter 28, Problem 23P

Polymerization of styrene can occur by a free-radical, cationic, anionic, or coordination mechanism. What mechanism will be followed when each of the compounds shown is used to initiate polymerization?

(a) ${\text{TiCl}}_{\text{4}}\text{, }{\left({\text{CH}}_{\text{3}}{\text{CH}}_{\text{2}}\right)}_{\text{3}}\text{Al}$

(b)

(c) ${\text{BF}}_{\text{3}}$