Polymorphism and pseudosymmetry of 10,10′-oxybis(9-thia-10-hydro-10-boraanthracene)

  • We have encountered two polymorphs of the title compound, C24H16B2OS2, both of which display almost the same unit-cell parameters. Compound (I) crystallizes in the non-centrosymmetric space group P21 with four mol­ecules in the asymmetric unit. These mol­ecules are related by pseudosymmetry. As a result, the space group looks like P21/c, but the structure cannot be refined successfully in that space group. Compound (II) on the other hand crystallizes in the centrosymmetric space group P21/c with only two mol­ecules in the asymmetric unit. The crystals studied for (I) and (II) were both non-merohedral twins.

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Author:Julian Radtke, Hans-Wolfram LernerGND, Michael BolteORCiD
Parent Title (English):Acta crystallographica. Section E, Crystallographic communications
Publisher:International Union of Crystallography ; National Center for Biotechnology Information, U.S. National Library of Medicine
Place of publication:Chester ; Bethesda, MD
Contributor(s):A. J. Lough
Document Type:Article
Year of Completion:2019
Date of first Publication:2019/04/25
Publishing Institution:Universitätsbibliothek Johann Christian Senckenberg
Release Date:2019/09/16
Tag:crystal structure; polymorphism; pseudosymmetry; twinning
Page Number:30
First Page:690
Last Page:694
This is an open-access article distributed under the terms of the Creative Commons Attribution (CC-BY) Licence, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are cited.
Institutes:Biochemie, Chemie und Pharmazie / Biochemie und Chemie
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 54 Chemie / 540 Chemie und zugeordnete Wissenschaften
Open-Access-Publikationsfonds:Biochemie, Chemie und Pharmazie
Licence (German):License LogoCreative Commons - Namensnennung 4.0