Adjective
English Wikipedia has an article on:isotacticWikipedia
isotactic (not comparable)
(chemistry, of a polymer) Having substituents arranged in the same (rather than random) configuration in each repeat unit
Both isotactic and syndiotactic polypropylene are crystalline, whereas atactic polypropylene, which can also be prepared with special Ziegler–Natta catalysts, is amorphous. Source: Internet
In hemi isotactic macromolecules every other repeat unit has a random substituent. Source: Internet
Short segments of polypropylene, showing examples of isotactic (above) and syndiotactic (below) tacticity The concept of stereoregularity in polymer chains is illustrated in the picture on the left with polypropylene. Source: Internet
These catalysts polymerize propylene and other 1-alkenes to highly crystalline isotactic polymers. Source: Internet
There are three types: isotactic (all substituents on the same side), atactic (random placement of substituents), and syndiotactic (alternating placement of substituents). Source: Internet
The average meso sequence length may be approximated from the relative abundance of pentads as follows: citation Polymers Isotactic polymers Isotactic polymers are composed of isotactic macromolecules (IUPAC definition). Source: Internet