相关软件或概念:Olex2[1] (Version: Olex2-1.5); PLATON[2] (Version: 241123); SHELXL[3] (Version: SHELXL-2019/2) ▲图1 B级警报PLAT417 找到H1B,发现是一个水分子上的氢原子,查看该水分子周围环境,发现是H1B和H1Bi之间的距离为2.030 Å,小于2.1 Å而引发了B级警报PLAT417,实际上该水分子附近还有一个Cl1ii,和O1之间的距离为3.125 Å,是一个能够形成合适氢键的距离,所以H1B的位置不对,如图2所示。 ▲图2 水分子O1及其周围环境 将H1B的位置调整为朝向Cl1ii使它们之间形成合适的氢键,此时不再有PLAT417的警报提示,如图3所示。 ▲图3 调整氢原子至合适位置后的结果 参考文献 [1]Dolomanov, O. V.; Bourhis, L. J.; Gildea, R. J.; Howard, J. A. K.; Puschmann,H. OLEX2: A complete structure solution,refinement and analysis program. J. Appl. Cryst. 2009, 42, 339–341. [2] (a) Spek, A. L. Single-crystal structure validationwith the program PLATON. J. Appl.Cryst. 2003, 36, 7–13. (b) Spek,A. L. Structure validation in chemical crystallography. Acta Cryst. 2009, D65, 148–155. (c) Spek, A. L. What makes a crystal structure reportvalid? Inorg. Chim. Acta 2018, 470, 232–237. (d) Spek, A. L. checkCIFvalidation ALERTS: what they mean and how to respond. Acta Cryst. 2020, E76, 1–11. [3](a) Sheldrick, G. M. SHELXL-2019/2, Program for Crystal Structure Refinement,University of Göttingen, Germany, 2019. (b) Sheldrick, G. M. A short history ofSHELX. Acta Cryst. 2008, A64, 112–122. (c) Sheldrick, G. M.Crystal structure refinement with SHELXL.Acta Cryst. 2015, C71, 3–8. (d)Lübben, J.; Wandtke, C. M.; Hübschle, C. B.; Ruf, M.; Sheldrick, G. M.;Dittrich, B. Aspherical scattering factors for SHELXL – model, implementation and application. Acta Cryst. 2019, A75, 50–62. 如需PDF文档,请从以下链接下载: 通过网盘分享的文件:晶体结构解析案例37(B级警报PLAT417).pdf
|