Conformation of condensed polycyclic aromatic hydrocarbons Part III. The molecular and crystal structure of tribenzo [a,h,rst] phenanthra [1,2,10-cde] pentaphene: a simple analysis of the in-plane distortions due to overcrowding
作者:Isao Oonishi、Shigeru Ohshima、Shoji Fujisawa、Junji Aoki、Yuji Ohashi、Tadeusz Marek Krygowski
DOI:10.1016/0022-2860(92)80107-s
日期:1992.2
Abstract The crystal and molecular structure of tribenzo [ a,h,rst ] phenanthra [1,2,10- cde ] pentaphene was determined by X-ray diffraction with final agreement factor R=0.057 for 2842 reflections. The molecule is largely distorted from a planar structure owing to a steric repulsion between the overcrowded hydrogen atoms. The deviations of the atoms from the mean plane of the whole molecule range
摘要 通过X射线衍射确定了三苯并[a,h,rst]菲[1,2,10-cde]五苯的晶体和分子结构,2842次反射的最终一致性因子R=0.057。由于过度拥挤的氢原子之间的空间排斥,该分子从平面结构很大程度上扭曲。原子与整个分子平均平面的偏差范围为 -1.78 到 1.52 A。该分子具有垂直于平均分子平面的近似双重轴并呈鞍形。平面外和平面内失真的简单分析表明后者不应被忽略。