Title
|
|
|
|
Conformational polymorphism of (E,E)-N,N′-bis(4-nitrobenzylidene)benzene-1,4-diamine
| |
Author
|
|
|
|
| |
Abstract
|
|
|
|
Two polymorphs of (E,E)-N,N′-bis(4-nitrobenzylidene)benzene-1,4-diamine, C20H14N4O4, (I), have been identified. In each case, the molecule lies across a crystallographic inversion centre. The supramolecular structure of the first polymorph, (I-1), features stacking based on ππ interactions assisted by weak hydrogen bonds involving the nitro groups. The second polymorph, (I-2), displays a perpendicular arrangement of molecules linked via the nitro groups, combined with weak CH...O hydrogen bonds. Both crystal structures are compared with that of the carbon analogue (E,E)-1,4-bis[2-(4-nitrophenyl)ethenyl]benzene, (II). |
| |
Language
|
|
|
|
English
| |
Source (journal)
|
|
|
|
Acta crystallographica: section C: crystal structure communications. - Copenhagen
| |
Publication
|
|
|
|
Copenhagen
:
2011
| |
ISSN
|
|
|
|
0108-2701
| |
DOI
|
|
|
|
10.1107/S0108270111010109
| |
Volume/pages
|
|
|
|
67
:5
(2011)
, p. o171-o174
| |
ISI
|
|
|
|
000290223300021
| |
Full text (Publisher's DOI)
|
|
|
|
| |
|