Crystal structures of isotypic poly[bis(benzimidazolium) [tetra-μ-iodido-stannate(II)]] and poly[bis(5,6-difluorobenzimidazolium) [tetra-μ-iodido-stannate(II)]]
| Autor: | Silvio Decurtins, Shi-Xia Liu, Iwan Zimmermann, Jürg Hauser, Tony D. Keene |
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| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
crystal structure
Stannate Crystal structure tin(II) iodide layers benzimidazolium Research Communications lcsh:Chemistry symbols.namesake chemistry.chemical_compound 540 Chemistry Molecular symmetry General Materials Science Ammonium Isostructural biology Chemistry Hydrogen bond General Chemistry Condensed Matter Physics biology.organism_classification Crystallography lcsh:QD1-999 symbols Tetra 570 Life sciences van der Waals force perovskite layer |
| Zdroj: | Zimmermann, Iwan; Keene, Tony Derek; Hauser, Jürg; Decurtins, Silvio; Liu, Shi-Xia (2014). Crystal structures of isotypic poly[bis(benzimidazolium) [tetra-μ-iodido-stannate(II)]] and poly[bis(5,6-difluorobenzimidazolium) [tetra-μ-iodido-stannate(II)]]. Acta Crystallographica Section E Structure Reports Online, 70(10), pp. 178-182. International Union of Crystallography 10.1107/S1600536814019151 Acta Crystallographica Section E: Structure Reports Acta Crystallographica Section E, Vol 70, Iss 10, Pp 178-182 (2014) |
| DOI: | 10.1107/S1600536814019151 |
| Popis: | The bicyclic aromatic benzimidazolium cation stabilizes the layered perovskite structure comprising inorganic {[SnI4]2−}n sheets. A difluoro-substitution of the organic cation demonstrates the structural versatility of the new approach. The isostructural title compounds, {(C7H7N2)2[SnI4]}n, (1), and {(C7H5F2N2)2[SnI4]}n, (2), show a layered perovskite-type structure composed of anionic {[SnI4]2−}n sheets parallel to (100), which are decorated on both sides with templating benzimidazolium or 5,6-difluorobenzimidazolium cations, respectively. These planar organic heterocycles mainly form N—H⋯I hydrogen bonds to the terminal I atoms of the corner-sharing [SnI6] octahedra (point group symmetry 2) from the inorganic layer, but not to the bridging ones. This is in contrast to most of the reported structures of related compounds where ammonium cations are involved. Here hydrogen bonding to both types of iodine atoms and thereby a distortion of the inorganic layers to various extents is observed. For (1) and (2), all Sn—I—Sn angles are linear and no out-of-plane distortions of the inorganic layers occur, a fact of relevance in view of the material properties. The arrangement of the aromatic cations is mainly determined through the direction of the N—H⋯I hydrogen bonds. The coherence between organic bilayers along [100] is mainly achieved through van der Waals interactions. |
| Databáze: | OpenAIRE |
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