Halide Influence on Molecular and Supramolecular Arrangements of Iron Complexes with a 3,5-Bis(2-Pyridyl)-1,2,4,6-Thiatriazine Ligand
| Autor: | Ilia Korobkov, Katie L. M. Harriman, Jaclyn L. Brusso, Rodolphe Clérac, Irina A. Kühne, Muralee Murugesu, Alicea A. Leitch |
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| Přispěvatelé: | Department of Chemistry and Biomolecular Science, University of Ottawa, Centre de Recherche Paul Pascal (CRPP), Université de Bordeaux (UB)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: |
010405 organic chemistry
Chemistry Coordination polymer Supramolecular chemistry Halide Nanotechnology [CHIM.INOR]Chemical Sciences/Inorganic chemistry 010402 general chemistry Electrochemistry 01 natural sciences 0104 chemical sciences Inorganic Chemistry Trigonal bipyramidal molecular geometry Crystallography Paramagnetism chemistry.chemical_compound medicine Ferric Physical and Theoretical Chemistry Spectroscopy medicine.drug |
| Zdroj: | Inorganic Chemistry Inorganic Chemistry, American Chemical Society, 2016, 55, pp. 5375-5383. ⟨10.1021/acs.inorgchem.6b00357⟩ |
| ISSN: | 0020-1669 1520-510X |
| DOI: | 10.1021/acs.inorgchem.6b00357⟩ |
| Popis: | International audience; A series of iron centered complexes, namely, [Fe(Py2TTA)Cl2] (1), [Fe(Py2TTA)Br2] (2), and [Fe(μ-F)(Py2TTAO)F]∞ (3), were isolated via complexation of 3,5-bis(2-pyridyl)-1,2,4,6-thiatriazine (Py2TTAH) with various ferric halides (e.g., FeF3, FeCl3, and FeBr3). Comparison of the optical and electrochemical spectroscopy, structural analysis, and magnetic studies reveal numerous similarities between the chlorido (1) and bromido (2) derivatives, which crystallize as discrete five-coordinate iron centered complexes with coordination geometries that are intermediate between trigonal bipyramidal and square base pyramid. Conversely, thefluorido derivative (3) results in a completely different structure due to oxidation of the ligand and the formation of a onedimensional coordination polymer held together through a bridging fluoride ion. Consequently, the spectroscopic and magnetic behavior of 3 differs significantly compared with 1 and 2. Complexes 1 and 2 exhibit paramagnetic properties typical for a mononuclear S = 5/2 system with weak intermolecular antiferromagnetic interactions at low temperatures, whereas complex 3demonstrates significant exchange couplings within the chain and weak antiferromagnetic interchain interactions, which stabilizea canted antiferromagnetic state below 4.2 K. |
| Databáze: | OpenAIRE |
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