An unusual case of OD-allotwinning: 9,9′-(2,5-dibromo-1,4-phenylene)bis[9H-carbazole]-Reference-Cited by-同舟云学术

An unusual case of OD-allotwinning: 9,9′-(2,5-dibromo-1,4-phenylene)bis[9H-carbazole]

Published:2017-01-31 Issue:1 Volume:73 Page:65-73
ISSN:2052-5206
Container-title:Acta Crystallographica Section B Structural Science, Crystal Engineering and Materials
language:
Short-container-title:Acta Crystallogr Sect B

Author:

Kautny Paul,Schwartz Thomas,Stöger Berthold^ORCID,Fröhlich Johannes

Abstract

9,9′-(2,5-Dibromo-1,4-phenylene)bis[9H-carbazole] (1) crystallizes as a category I order–disorder (OD) structure composed of non-polar layers of one kind with B2/m(1)1 layer symmetry. The crystals are made up of the two polytypes with a maximum degree of order (MDO). The monoclinic MDO1 polytype (B21/d) possesses an orthorhombic B-centered lattice and appears in two orientations, which are related by reflection at (100). The orthorhombic MDO2 polytype (F2dd) has a doubled b-axis and appears in two orientations, which are related by inversion. The crystal structures of both polytypes were determined in a concurrent refinement. The MDO1:MDO2 ratio is 69:31.

Publisher

International Union of Crystallography (IUCr)

Subject

Materials Chemistry,Metals and Alloys,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials

Link

http://journals.iucr.org/b/issues/2017/01/00/wf5130/wf5130.pdf

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