Abstract
The synthesis of cis-1,4-isotactic polypentadiene with Neodymium (Nd)-catalytic systems yields polymers of higher stereoregularity than previously available and made possible the determination of the crystal structure of this polydiene. The lattice is orthorhombic with a=9.49, b=6.07, and c (fiber axis)=8.17 Å; space group P212121 implies the presence of two isochiral chains in the unit cell. The refinement of the crystal structure also establishes the details of the structure confirming the (CS+TS−)2 chain conformation originally proposed on the basis of the fiber repeat.
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Purevsuren, B., Allegra, G., Meille, S. et al. cis-Isotactic 1,4-Polypentadiene. NMR Solution Characterization and Crystal Structure of Polymers Prepared with Neodymium-Catalytic Systems. Polym J 30, 431–434 (1998). https://doi.org/10.1295/polymj.30.431
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DOI: https://doi.org/10.1295/polymj.30.431
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