Dinuclear Diferrous Complexes of a Bis(tetradentate) Dinucleating Ligand: Influence of the Exogenous Ligands on the Molecular and Electronic Structures

Röhs F, Dammers S, Stammler A, Oldengott J, Bögge H, Bill E, Glaser T (2022)
European Journal of Inorganic Chemistry 2022(18): e202200177.

Zeitschriftenaufsatz | Veröffentlicht | Englisch
 
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Abstract / Bemerkung
The ligand susan(6-Me) (susan(6-Me) 4,7-dimethyl-1,1,10,10-tetra(6 methyl-2-pyridylmethyl)-1,4,7,10-tetraazadecane) allows the synthesis of a peroxo complex that is only a transient species under catalytic conditions with the closely related ligand susan (susan - 4,7-dimethyl-1,1,10,10-tetra(2-pyridylmethyl)-1,4,7,10- tetraazadecane). For the synthesis of a peroxo complex - analogous to that of susan(6-Me) we present here the three air- sensitive complexes [(susan){(FeCl2)-Cl-II}(2)], [(susan){Fe-II(OTf)(2)}(2)], and [(susan){Fe-II(mu-OH)(2)Fe-II}](ClO4)(2) as potential precursors. [(susan){Fe-II(mu-OH)(2)Fe-II}](ClO4)(2) shows weak antiferromagnetic coupling and a g -16 EPR signal. Dissolving [(susan){Fe-II(OTf)(2)}(2)] in CH3CN forms Rsusan){Fe-II(CH3CN)(2)}(2)](4+) that shows a spin transition upon cooling as evidenced by UV-Vis, H-1 NMR, and Mbssbauer spectroscopies. In the UV-Vis-NIR spectra the combination of (i) the energy of the MLCT, (ii) the energy, and (iii) the splitting of the d-d transitions provide insight into the overall electron donation and into the different sigma-donor/pi-donor/pi-acceptor capabilities of the exogenous ligands. These experimental signatures provide insight into the molecular structures in solution e.g. during reactions with O-2.
Stichworte
Dinucleating ligand; Iron complexes; Integer spin EPR; Magnetic; properties; Moessbauer spectroscopy; UV/Vis spectroscopy
Erscheinungsjahr
2022
Zeitschriftentitel
European Journal of Inorganic Chemistry
Band
2022
Ausgabe
18
Art.-Nr.
e202200177
ISSN
1434-1948
eISSN
1099-0682
Page URI
https://pub.uni-bielefeld.de/record/2964345

Zitieren

Röhs F, Dammers S, Stammler A, et al. Dinuclear Diferrous Complexes of a Bis(tetradentate) Dinucleating Ligand: Influence of the Exogenous Ligands on the Molecular and Electronic Structures. European Journal of Inorganic Chemistry . 2022;2022(18): e202200177.
Röhs, F., Dammers, S., Stammler, A., Oldengott, J., Bögge, H., Bill, E., & Glaser, T. (2022). Dinuclear Diferrous Complexes of a Bis(tetradentate) Dinucleating Ligand: Influence of the Exogenous Ligands on the Molecular and Electronic Structures. European Journal of Inorganic Chemistry , 2022(18), e202200177. https://doi.org/10.1002/ejic.202200177
Röhs, F., Dammers, S., Stammler, A., Oldengott, J., Bögge, H., Bill, E., and Glaser, T. (2022). Dinuclear Diferrous Complexes of a Bis(tetradentate) Dinucleating Ligand: Influence of the Exogenous Ligands on the Molecular and Electronic Structures. European Journal of Inorganic Chemistry 2022:e202200177.
Röhs, F., et al., 2022. Dinuclear Diferrous Complexes of a Bis(tetradentate) Dinucleating Ligand: Influence of the Exogenous Ligands on the Molecular and Electronic Structures. European Journal of Inorganic Chemistry , 2022(18): e202200177.
F. Röhs, et al., “Dinuclear Diferrous Complexes of a Bis(tetradentate) Dinucleating Ligand: Influence of the Exogenous Ligands on the Molecular and Electronic Structures”, European Journal of Inorganic Chemistry , vol. 2022, 2022, : e202200177.
Röhs, F., Dammers, S., Stammler, A., Oldengott, J., Bögge, H., Bill, E., Glaser, T.: Dinuclear Diferrous Complexes of a Bis(tetradentate) Dinucleating Ligand: Influence of the Exogenous Ligands on the Molecular and Electronic Structures. European Journal of Inorganic Chemistry . 2022, : e202200177 (2022).
Röhs, Fridolin, Dammers, Susanne, Stammler, Anja, Oldengott, Jan, Bögge, Hartmut, Bill, Eckhard, and Glaser, Thorsten. “Dinuclear Diferrous Complexes of a Bis(tetradentate) Dinucleating Ligand: Influence of the Exogenous Ligands on the Molecular and Electronic Structures”. European Journal of Inorganic Chemistry 2022.18 (2022): e202200177.

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