A-level Chemistry/OCR (Salters)/Open-Book Paper/Stereochemistry in poly(propene)

The three structural forms of poly(alkenes) edit

Isotactic edit

Isotactic polymers have all their R-groups pointing in the same direction.

   

Syndiotactic edit

Syndiotactic polymers have their R-groups pointing in alternating directions.

   

Atactic edit

Atactic polymers have no regularity in the direction of their R-groups.