Discussion
An isotactic polymer has its substituent groups
Answer: D
Correct answer: all on the same side of the chain
Isotactic means every substituent lies on the same side of the backbone, syndiotactic means they alternate regularly, and atactic means they are randomly placed. Tacticity matters because regularity allows the chains to pack: isotactic polypropylene is crystalline, strong and useful, while the atactic form of the same chemical compound is a soft amorphous material of no structural value.
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