4.7 Article

A strategy for predicting the crystal structure of energetic N-oxides based on molecular similarity and electrostatic matching

期刊

CRYSTENGCOMM
卷 23, 期 3, 页码 714-723

出版社

ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ce01501f

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资金

  1. Youth Talent of Shaanxi TeZhi Program
  2. National Natural Science Foundation of China [21875184]

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Crystal structure predictions for high energy materials are crucial, and this study presents an alternative strategy based on packing similarity of homologous crystals for predicting organic crystal structures. By utilizing rules of molecular similarity and electrostatic matching, successful and rapid predictions were achieved for two energetic N-oxides. This approach is envisioned to provide a new method for predicting crystal structures of various high energy materials.
Crystal structure predictions are significant and meaningful for the design of high energy materials since different packing modes can greatly influence their properties, such as energy and safety. In view of the difficulty of organic crystal structure predictions, an alternative strategy was proposed in this work based on the packing similarity of homologous crystals. As a case study, the crystal structures of two energetic N-oxides were accurately and rapidly predicted by this strategy, that is, using their O-free analogues with known structures to generate initial crystals. Two rules, molecular similarity and electrostatic matching, were put forward to ensure the packing similarity in the practical applications of crystal structure predictions. Despite the limited number of homologous crystals of energetic N-oxides, this study is envisioned to provide a new approach to predict crystal structures of other high energy materials.

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