抄録
The crystal structure of poly (p-benzamide) was determined by the X-ray diffraction method. All reflections were indexed by an orthorhombic unit cell with dimensions of a=7.74(2), b=5.27(1), and c=12.82(5)Å The space group symmetry was P212121. The unit cell contains two 21-helix polymer chains. The detailed structure was analyzed by the linked-atom least-squares method. It was found that the crystal structure was composed of stacked sheets in which polymer chains link to each other by NH-0 hydrogen bonds along the b-axis. No hydrogen bonds form between these sheets. This scheme of the hydrogen bonding is quite similar to that in poly (p-phenylene terephthalamide). As observed in other aromatic amide compounds, torsion angles between the amide and the benzene plane are about ±30°.
