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Tetrazine Chelate Ligands Bridging Two [Ru(acac)(2)] Fragments: Mixed Valency and Radical Complex Formation
- 1.0558484 - ÚFCH JH 2023 RIV DE eng J - Článek v odborném periodiku
Kaim, W. - Löw, I. - Ringenberg, M. R. - Schwederski, B. - Filippou, V. - Fiedler, Jan
Tetrazine Chelate Ligands Bridging Two [Ru(acac)(2)] Fragments: Mixed Valency and Radical Complex Formation.
Zeitschrift für anorganische und allgemeine Chemie. Roč. 648, č. 23 (2022), č. článku e202200152. ISSN 0044-2313. E-ISSN 1521-3749
Grant CEP: GA ČR(CZ) GA19-03160S
Institucionální podpora: RVO:61388955
Klíčová slova: diruthenium complexes * ruthenium * epr * l=3-amino-6-(3,5-dimethylpyrazol-1-yl)-1,2,4,5-tetrazine * acetylacetonate * superexchange * coordination * Crystal structure * Cyclic voltammetry * Diruthenium compounds * EPR spectroscopy * Spectroelectrochemistry
Obor OECD: Physical chemistry
Impakt faktor: 1.4, rok: 2022
Způsob publikování: Open access
Using bis(3-methyl-2-pyridyl)-1,2,4,5-tetrazine 1, 3-(2-pyrimidyl)-6-methyl-1,2,4,5-tetrazine 2 and bis(2-pyrimidyl)-1,2,4,5-tetrazine=bmtz as ligands, the complexes 3=[Ru(acac)(2)(1)], 4={[Ru(acac)(2)](2)(1)], 5={[Ru(acac)(2)](2)(bmtz)], and 6={[Ru(acac)(2)](2)(2)] were prepared and identified by structure analysis of crystallized material. The one-electron oxidized form 6(PF6) was also studied structurally, suggesting a Class II mixed-valent situation. The neutral dinuclear systems exhibit two reversible oxidation processes with comproportionation constants 10(9.2)<K-c<10(14.1) and one reduction which were analyzed UV/vis/NIR and EPR spectroscopically. Oxidation produces largely metal-based mixed-valent cations with very weak intervalence absorptions in the near IR whereas the electron uptake occurs at the tetrazine acceptor.
Trvalý link: http://hdl.handle.net/11104/0332128
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