Tacticity describes the stereochemical ordering of configurational units along a polymer chain. It is distinct from the head-to-tail or head-to-head connectivity described by regioselectivity.
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Tacticity refers to the arrangement of the polymer chains' repeating structural units in relation to one another, particularly in stereochemistry. It is a key concept in polymer science and chemistry that affects the physical properties of polymers. There are three main types of tacticity: 1. **Isotactic**: In isotactic polymers, all the substituent groups (or side chains) are on the same side of the polymer chain, leading to a regular and symmetrical structure.