Supramolecular Circular Helicates Formed by Destabilisation of Supramolecular Dimers
| Autor: | Floriana Tuna, Emmanuelle Leize-Wagner, Laura J. Childs, Alain Van Dorsselaer, Hélène Nierengarten, Nathaniel W. Alcock, William Errington, Alexander Jackson, Siona Bunce, Jacqueline Hamblin, Michael J. Hannon |
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| Rok vydání: | 2007 |
| Předmět: |
Silver
Pyridines Dimer Organic Chemistry Supramolecular chemistry chemistry.chemical_element Trimer General Chemistry Crystallography X-Ray Ligands Copper Catalysis Metal Nickel chemistry.chemical_compound Crystallography Octahedron chemistry visual_art visual_art.visual_art_medium Destabilisation Dimerization |
| Zdroj: | Chemistry - A European Journal. 13:9286-9296 |
| ISSN: | 1521-3765 0947-6539 |
| DOI: | 10.1002/chem.200700848 |
| Popis: | The effect of changes in the angles at the connection points of linear/circular helicates is explored as a route to control the nuclearity and architecture of metallo-supramolecular arrays. This effect is probed by changing the geometry of the metal centre used to assemble bis-pyridylimine ligands that contain a 1,3-bis(aminomethyl) benzene spacer group. Tetrahedral metal ions favour linear dimers, whereas octahedral nickel(II) predominantly gives a triangular circular helicate. Five-coordinate copper(II) falls in the middle of these extremes and results in the formation of solvent-dependent mixtures of dimer and trimer. The trinuclear, triangular, circular helicate structures, which result from coordination to copper(II) and nickel(II), are structurally characterised by X-ray crystallography and reveal that the units can aggregate into hexagonal arrays that contain anion-filled tube-like channels in the solid state. |
| Databáze: | OpenAIRE |
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