Abstract
The crystal structure of meso-(2R,4r,6S)-2,4,6-heptanetriol as a model compound for syndiotactic poly(vinyl alcohol) was determined. The crystal belongs to a triclinic system with dimensions of a=10.950(9), b=9.904(11), c=14.199(13)Å, α=104.47(11), β=114.10(8), and γ=70.34(7)°. The space groupis P1 and Dx=1.125, Dm=1.122 Mgm−3, and Z=6. The final R factor was 0.080 for 3348 observed reflections. There are three crystallographically independent molecules in the unit cell. The seven carbon atoms of these three molecules have TTTT sequences and the OH groups form intermolecular hydrogen bonds. The best planes composed of seven carbon atoms of the three independent molecules are nearly parallel to each other and the molecular axes of the all molecules are nearly parallel to each other and point in the direction of the a-axis.
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Kuribayashi, S. Crystal Structure of meso-(2R,4r,6S)-2,4,6-Heptanetriol as a Model Compound for Syndiotactic Poly(vinyl alcohol). Polym J 17, 1037–1043 (1985). https://doi.org/10.1295/polymj.17.1037
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DOI: https://doi.org/10.1295/polymj.17.1037