TY - JOUR A1 - Radtke, Julian A1 - Lerner, Hans-Wolfram A1 - Bolte, Michael T1 - Polymorphism and pseudosymmetry of 10,10′-oxybis(9-thia-10-hydro-10-boraanthracene) T2 - Acta crystallographica. Section E, Crystallographic communications N2 - 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. KW - crystal structure KW - twinning KW - pseudosymmetry KW - polymorphism Y1 - 2019 UR - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/51075 UR - https://nbn-resolving.org/urn:nbn:de:hebis:30:3-510754 SN - 2056-9890 N1 - 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. VL - 75 IS - 5 SP - 690 EP - 694 PB - International Union of Crystallography ; National Center for Biotechnology Information, U.S. National Library of Medicine CY - Chester ; Bethesda, MD ER -