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

Authors :: Radtke J
Lerner HW
Bolte M
Source :: Acta crystallographica. Section E, Crystallographic communications [Acta Crystallogr E Crystallogr Commun] 2019 Apr 25; Vol. 75 (Pt 5), pp. 690-694. Date of Electronic Publication: 2019 Apr 25 (Print Publication: 2019).
Publication Year :: 2019
Abstract: We have encountered two polymorphs of the title compound, C <subscript>24</subscript> H <subscript>16</subscript> B <subscript>2</subscript> OS <subscript>2</subscript> , both of which display almost the same unit-cell parameters. Compound (I) crystallizes in the non-centrosymmetric space group P 2 <subscript>1</subscript> with four mol-ecules in the asymmetric unit. These mol-ecules are related by pseudosymmetry. As a result, the space group looks like P 2 <subscript>1</subscript> / c , but the structure cannot be refined successfully in that space group. Compound (II) on the other hand crystallizes in the centrosymmetric space group P 2 <subscript>1</subscript> / c with only two mol-ecules in the asymmetric unit. The crystals studied for (I) and (II) were both non-merohedral twins.

Language :: English
ISSN :: 2056-9890
Volume :: 75
Issue :: Pt 5
Database :: MEDLINE
Journal :: Acta crystallographica. Section E, Crystallographic communications
Publication Type :: Academic Journal
Accession number :: 31110812
Full Text :: https://doi.org/10.1107/S205698901900522X

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