Acta Cryst. (2007). C63, o196-o200 [ doi:10.1107/S0108270107005690 ]
Abstract: The crystal structures of the four E,Z,E isomers of 1-(4-alkoxyphenyl)-6-(4-nitrophenyl)hexa-1,3,5-triene, namely (E,Z,E)-1-(4-methoxyphenyl)-6-(4-nitrophenyl)hexa-1,3,5-triene, C19H17NO3, (E,Z,E)-1-(4-ethoxyphenyl)-6-(4-nitrophenyl)hexa-1,3,5-triene, C20H19NO3, (E,Z,E)-1-(4-nitrophenyl)-6-(4-n-propoxyphenyl)hexa-1,3,5-triene, C21H21NO3, and (E,Z,E)-1-(4-n-butoxyphenyl)-6-(4-nitrophenyl)hexa-1,3,5-triene, C22H23NO3, have been determined. Intermolecular N
O dipole interactions between the nitro groups are observed for the methoxy derivative, while for the ethoxy derivative, two adjacent molecules are linked at both ends through NO dipole-dipole interactions between the N atom of the nitro group and the O atom of the ethoxy group to form a supramolecular ring-like structure. In the crystal structures of the n-propoxy and n-butoxy derivatives, the shortest intermolecular distances are those between the two O atoms of the alkoxy groups. Thus, the nearest two molecules form an S-shaped supramolecular dimer in these crystal structures.
Formula: C19H17NO3, C20H19NO3, C21H21NO3 and C22H23NO3
 |   Structure factor file (CIF format) (182.2 kbytes) |
| Structure factor file (CIF format) (145.9 kbytes) |
| Structure factor file (CIF format) (196.4 kbytes) |
| Structure factor file (CIF format) (211.2 kbytes) |
To open or display or play some files, you may need to set your browser up to use the appropriate software. See the full list of file types for an explanation of the different file types and their related mime types and, where available links to sites from where the appropriate software may be obtained.
The download button will force most browsers to prompt for a file name to store the data on your hard disk.
Where possible, images are represented by thumbnails.
Copyright © International Union of Crystallography
IUCr Webmaster