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Problem 2 - Entrance Test

A specific type of polymerization reaction typically yields a polymer with a highly ordered stereochemical configuration, such as isotactic or syndiotactic, largely due to the use of coordinate anionic catalysts. Which polymerization method is being referred to, and what kind of polymer is typically synthesized this way from a common monomer?

Correct: B

The question describes a polymerization method that provides high stereochemical control (isotactic or syndiotactic) through coordinate anionic catalysts. This is a hallmark of Ziegler-Natta polymerization. While free radical polymerization often leads to atactic polymers due to lack of stereochemical control, Ziegler-Natta catalysts are crucial for producing stereoregular polymers like isotactic polypropylene from propene. Isotactic polypropylene has superior mechanical properties compared to its atactic counterpart, making it highly valuable.