Question

Vinylidene chloride, H₂C = CHCl, does not polymerize in isotactic, syndiotactic, and atactic forms. Explain.

Short answer

Vinylidene chloride does not polymerize in isotactic, syndiotactic, and Atactic forms because no asymmetric carbon is formed in the polymerization.

Step-by-step solution

Polymer forms

There are three polymeric forms isotactic, Syndiotactic, and Atactic forms.

1. Isotactic: it is defined as the asymmetric forms in which the substituents are arranged on the same side of the macromolecular backbone. It is one of the popular forms of polymer.

2. Syndiotactic: it is defined as the asymmetric form in which the substituents have a regular and alternate pattern in the side backbone chain.

Example: gutta-percha is a type of dental filling.

3. Atactic: It is defined as the asymmetric polymer in which substituents are arranged asymmetrically in the main chain in a random manner.

Vinylidene does not form Polymer

Vinylidene does not show polymerization in the isotactic, syndiotactic and atactic forms because all are the asymmetric forms that all must contain the asymmetric carbon and all that carbon the arrangement of the substituents vary but vinylidene does not contain the single asymmetric carbon so, does not form such polymeric forms as shown: