The crystal structure of isotactic poly (propylene oxide)

The results of a detailed investigation on the crystal structure of poly(propylene oxide) are reported. The chain model here proposed differs from the full-planar one only by a deviation of 15° around the C? O bonds. This model is accounted for by both the sensibly better agreement between F_o and F_c and the more justifiable intra-chain contacts with respect to those observed for the model previously studied by STANLEY and LITT , with which it is compared.