Abstract
Three of the nine isomeric N-(nitrobenzylidene)iodoanilines, C13H9IN2O2, have been found, when crystallized from acetone, to yield polymorphs which differ from those obtained upon crystallization from ethanol. In the second polymorph of 2-iodo-N-(2-nitrobenzylidene)aniline, the molecules are disordered across inversion centres in space group C2/c, but there are no direction-specific interactions between the molecules. In the second polymorph of 2-iodo-N-(3-nitrobenzylidene)aniline, the molecules adopt a different conformation from those in the first polymorph, and they are linked into sheets by a combination of a three-centre iodo-nitro interaction and an aromatic - stacking interaction, both of which are absent from the supramolecular structure of the first polymorph. The second polymorph of 3-iodo-N-(2-nitrobenzylidene)aniline crystallizes with Z' = 2 in space group P21, and the molecules are linked into sheets by one C-HO hydrogen bond and two C-H(arene) hydrogen bonds.
Formula: C52H36I4N8O8, C13H9IN2O2 and C13H9IN2O2
Formula: C52H36I4N8O8, C13H9IN2O2 and C13H9IN2O2
Original language | English |
---|---|
Pages (from-to) | o445-o449 |
Number of pages | 5 |
Journal | Acta Crystallographica Section C, Crystal Structure Communications |
Volume | C61 |
DOIs | |
Publication status | Published - 2005 |
Keywords
- Pi-stacking interactions
- Center-dot-nitro
- Crystal-structure prediction
- Small organic-molecules
- Hydrogen-bonds
- Interplay
- 1,4-diiodobenzene
- Patterns