The crystal structure of PTHF

The crystal structure of PTHF. By studying fiber photographs such as that shown in Fig. 24, Cesari, Perego, and Mazzei (83) conclude that the unit-cell has a monoclinic symmetry, with a = 5.61 A, b = 8.92 A, c = 12.25 A (fiber axis) and / = 134°30 space group C2/c. They studied 

The proposed arrangement of the polymer chains is shown in Figs. 25 and 26. 

Further confirmation of the planar zig-zag structure has been obtained from a study of PTHF s infrared and Raman spectra (84) which are shown in Fig. 33. 

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