Bis(pyrazol‐1‐yl)(pyridin‐x‐yl)methane Ligands – Mono‐ or Ditopic Ligands in Complexes and Supramolecular Frameworks
| Autor: | Blanca R. Manzano, M. Carmen Carrión, Félix A. Jalón, Gema Durá |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
chemistry.chemical_classification
010405 organic chemistry Stereochemistry Ligand Supramolecular chemistry 010402 general chemistry 01 natural sciences Methane 0104 chemical sciences Inorganic Chemistry Metal chemistry.chemical_compound Transition metal chemistry visual_art Polymer chemistry visual_art.visual_art_medium Non-covalent interactions |
| Zdroj: | European Journal of Inorganic Chemistry. 2016:2272-2295 |
| ISSN: | 1099-0682 1434-1948 |
| DOI: | 10.1002/ejic.201501271 |
| Popis: | Bis(pyrazol-1-yl)(pyridin-x-yl)methane ligands give rise to a rich variety of complexes with a wide range of transition metals. The derivatives with x = 2 act as monotopic and tripodal ligands. In the cases of ligands with x = 3 or 4, tripodal coordination is no longer possible and they generally behave as ditopic ligands that bridge two metal centres in cyclic dimers and trinuclear or polymeric species. The metal geometry has a clear influence on the type of compound formed. Ligands with x = 3 generate chiral cyclic dimers. Ligands that contain two bis(pyrazolyl)methane groups behave as ditopic, but they also act in a monotopic fashion in some cases. Analysis of the influence of some factors as the counteranion or the substituents on the ligand rings has been carried out. A two-step methodology starting from dimers and connectors was used to obtain egg-crate polymers or hexanuclear cyclic helicates. A comparative analysis of some parameters of the ligands has been performed. |
| Databáze: | OpenAIRE |
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