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

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The three structural forms of poly(alkenes)[edit]


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

Isotactic-A-2D-skeletal.png Isotactic-3D-balls.png


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

Syndiotactic-2D-skeletal.png Syndiotactic-3D-balls.png


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

Atactic-2D-skeletal.png Atactic-3D-balls.png