Modular Bimetallic Complexes with a Sulfonamido-Based Ligand
| Autor: | Yohei Sano, Joseph W. Ziller, Nathanael Lau, Andrew S. Borovik |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Spin states
010405 organic chemistry Ligand MathematicsofComputing_NUMERICALANALYSIS Ethylenediamine ComputerApplications_COMPUTERSINOTHERSYSTEMS 010402 general chemistry 01 natural sciences Spectral line Antiferromagnetic coupling Article 0104 chemical sciences law.invention Inorganic Chemistry Crystallography chemistry.chemical_compound chemistry Theoretical and Computational Chemistry law Inorganic & Nuclear Chemistry Other Chemical Sciences Electron paramagnetic resonance Bimetallic strip |
| Zdroj: | Dalton transactions (Cambridge, England : 2003), vol 47, iss 35 |
| Popis: | A series of bimetallic complexes prepared with the ligands N,N,N',N'-tetramethylethane-1,2-diamine (TMEDA) and N,N',N''-[2,2',2''-nitrilotris(ethane-2,1-diyl)]tris(2,4,6-trimethylbenzenesulfonamido) ([MST]3-) is described. Four diiron compounds of the formulation (TMEDA)FeII(X)-(μ-OH)-FeIIIMST were prepared, in which the X- ligands are the anions OTf-, Br-, SCN-, or N3-. Additionally, two heterobimetallic compounds of the formulation (TMEDA)MII(OTf)-(μ-OH)-FeIIIMST (MII = CoII or NiII) were synthesized. All these compounds have similar spectroscopic and structural properties. The diiron compounds exhibit perpendicular-mode electron paramagnetic resonance spectra consistent with S = 1/2 spin ground states, which is expected for high-spin FeII and FeIII centres that are antiferromagnetically coupled. The heterobimetallic (TMEDA)NiII(OTf)-(μ-OH)-FeIIIMST complex had a spin state of S = 3/2 that also resulted from antiferromagnetic coupling between the high-spin NiII and FeIII centres. The modularity of this system is further demonstrated by the substitution of the TMEDA ligand with ethylenediamine (en); for this species two equivalents of en coordinate to the FeII centre to form [(en)2FeII-(μ-OH)-FeIIIMST]OTf. These results demonstrate that a modular bimetallic system has been developed in which the key components can be modified. |
| Databáze: | OpenAIRE |
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