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首页> 外文期刊>Acta Crystallographica, Section B. Structural Science >Visualization and characterization of non-covalent networks in molecular crystals: automated assignment of graph-set descriptors for asymmetric molecules
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Visualization and characterization of non-covalent networks in molecular crystals: automated assignment of graph-set descriptors for asymmetric molecules

机译:分子晶体中非共价网络的可视化和表征:不对称分子的图形集描述符的自动分配

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摘要

A method of visualizing intermolecular networks (for example, hydrogen-bonded networks) in the crystalline state has been developed, based on the concept of link atoms, i.e. those atoms deemed to be in contact with each unique molecule or ion in the crystal chemical unit (CCU). Extension of a structure using each of these primary links can be achieved, enabling the generation and investigation of extended networks. Algorithms have been developed for the automatic assignment of graph-set notation for patterns up to second level, i.e. those involving one or two crystallographically independent non-covalent bonds, in the absence of internal crystallographic symmetry in the unique molecules of the CCU. The self, ring, chain and discrete motifs may be displayed by highlighting the atoms and bonds comprising the pattern. These methodologies have been implemented in the Cambridge Structural Database program PLUTO. [References: 34]
机译:基于连接原子的概念,即可视为与晶体化学单元中每个独特分子或离子接触的原子,已经开发了一种可视化晶态分子间网络(例如氢键网络)的方法。 (CCU)。可以实现使用这些主要链接中的每一个的结构扩展,从而可以生成和研究扩展网络。已经开发了用于自动分配图形集符号的算法,该算法可自动分配至第二级模式,即那些涉及一个或两个晶体学独立的非共价键的模式,而CCU的唯一分子中没有内部晶体学对称性。自身,环,链和不连续的图案可以通过突出显示构成图案的原子和键来显示。这些方法已在剑桥结构数据库程序PLUTO中实现。 [参考:34]

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