高等学校化学学报 ›› 1997, Vol. 18 ›› Issue (12): 1978.

• 论文 • 上一篇    下一篇

有机分子晶体中的局部结构无序(Ⅰ)

吕扬1, 王树春2, 郑启泰1, 刘维3, 李方华3   

  1. 1. 中国协和医科大学, 中国医学科学院药物研究所, 北京 100050;
    2. 陕西医学高等专科学校, 西安 710068;
    3. 中国科学院物理研究所, 北京 100080
  • 收稿日期:1996-10-23 出版日期:1997-12-24 发布日期:1997-12-24
  • 通讯作者: 吕扬, 女, 36岁, 副教授.
  • 作者简介:吕扬, 女, 36岁, 副教授.
  • 基金资助:

    国家自然科学基金

Local Structural Disorder in the Organic Molecular Crystals

LU Yang1, WANG Shu-Chun2, ZHENG Qi-Tai1, LIU Wei3, LI Fang-Hua3   

  1. 1. Institute of Materia Medica, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100050;
    2. Shanxi Medical College for Proffessional Training, Xi'an 710068;
    3. Institute of Physics, Academia Sinica, Beijing 100080
  • Received:1996-10-23 Online:1997-12-24 Published:1997-12-24

摘要: 应用单晶X衍射法测定5个有机分子样品结构,发现晶态下部分原子存在的无序排列(占有率,位置)导致分子构象的变化.X射线衍射分析获得的是分子的平均结构.由于有机分子晶体结构中普遍存在无序现象,故增加了X射线衍射分析在三维空间中测定晶体准确结构的难度.

关键词: 晶体结构, 构象差异, 结构无序

Abstract: Five organic compounds were selected and their structures were determined by Xray diffraction.It was found that the disordered arrangement (occupying rate, position) existing in the partial atoms under the crystal state leads to the exchange in the molecular conformation, and by means of X-ray diffraction analysis, the average molecular structures are obtained.The disorder phenomena in the organic crystal structures exist universally, which make it more difficult to determine the crystal structures correctly in three-dimensional space.

Key words: Crystal structure, Conformation difference, Structural disorder

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