Investigation of Electron Density Mapping of Crystal Structure of Linear Polymers Using Maximum Entropy Method and X-ray Powder Diffraction Data*

The purpose of this study is to visualize the electron density distribution of crystal structure of linear polymers by maximum entropy method (MEM) and X-ray powder profiles measured at SPring-8 (RIKEN, Hyogo, Japan). Crystal structure analysis was carried out for all the reflections by SHELX on WinGX software. Electron density distribution mapping has been investigated for the structure factor (F_obs), phase angle (f_cal) and standard deviation (σ) by ENIGMA (Tanaka et al., J. Appl. Cryst., 35, 282-286 (2002)). Tentative results on the MEM analysis for the X-ray powder diffraction data of Polymer crystal will be explained in my poster presentation