The three-component cocrystal 1,3,5-trifluoro-2,4,6-triiodobenzene-pyridine N-oxide-water (1/2/1) built up by halogen bonds, hydrogen bonds and π-π interactions
The title three-component cocrystal, C6F3I3·2C5H5NO·H2O, has been prepared as a strong candidate for multiple I⋯O interactions. Its crystal structure is compared with its 1:1 close relative, C6F3I3·C5H5NO [Aakeröy et al. (2014a ). CrystEngComm, 16, 28-31]. The 1,3,5-trifluoro-2,4,6-triiodobenzene an...
| Autores: | , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2015 |
| País: | Argentina |
| Institución: | Consejo Nacional de Investigaciones Científicas y Técnicas |
| Repositorio: | CONICET Digital (CONICET) |
| Idioma: | inglés |
| OAI Identifier: | oai:ri.conicet.gov.ar:11336/38018 |
| Acceso en línea: | http://hdl.handle.net/11336/38018 |
| Access Level: | acceso abierto |
| Palabra clave: | ACCEPTOR CRYSTAL STRUCTURE STRONG PYRIDINE N-OXIDE SUPRAMOLECULAR MESOGENS https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
| Sumario: | The title three-component cocrystal, C6F3I3·2C5H5NO·H2O, has been prepared as a strong candidate for multiple I⋯O interactions. Its crystal structure is compared with its 1:1 close relative, C6F3I3·C5H5NO [Aakeröy et al. (2014a ). CrystEngComm, 16, 28-31]. The 1,3,5-trifluoro-2,4,6-triiodobenzene and water species both have crystallographic twofold axial symmetry. The main synthon in both structures is the π-π stacking of benzene rings, complemented by a number of O-H⋯O, C-F⋯π and, fundamentally, C-I⋯O interactions. As expected, the latter are among the strongest and more directional interactions of the sort reported in the literature, confirming that pyridine N-oxide is an eager acceptor. On the other hand, the structure presents only two of these contacts per 1,3,5-trifluoro-2,4,6-triiodobenzene molecule instead of the expected three. Possible reasons for this limitation are analyzed. |
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