Zeitschriftenartikel:
P. Kautny, T. Schwartz, B. Stöger, J. Fröhlich:
"An unusual case of OD-allotwinning: 9,9 -(2,5-dibromo-1,4-phenylene)bis[9H-carbazole]";
Acta Crystallographica Section B,
73
(2017),
1;
S. 65
- 73.
Kurzfassung englisch:
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.
Schlagworte:
twinning; allotwinning; order-disorder polytypism
"Offizielle" elektronische Version der Publikation (entsprechend ihrem Digital Object Identifier - DOI)
http://dx.doi.org/10.1107/S2052520616018291
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.