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Tetrazine Chelate Ligands Bridging Two [Ru(acac)(2)] Fragments: Mixed Valency and Radical Complex Formation
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SYSNO ASEP 0558484 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Tetrazine Chelate Ligands Bridging Two [Ru(acac)(2)] Fragments: Mixed Valency and Radical Complex Formation Author(s) Kaim, W. (DE)
Löw, I. (DE)
Ringenberg, M. R. (DE)
Schwederski, B. (DE)
Filippou, V. (DE)
Fiedler, Jan (UFCH-W) RID, ORCIDArticle number e202200152 Source Title Zeitschrift für anorganische und allgemeine Chemie. - : Wiley - ISSN 0044-2313
Roč. 648, č. 23 (2022)Number of pages 9 s. Language eng - English Country DE - Germany Keywords 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 Subject RIV CF - Physical ; Theoretical Chemistry OECD category Physical chemistry R&D Projects GA19-03160S GA ČR - Czech Science Foundation (CSF) Method of publishing Open access Institutional support UFCH-W - RVO:61388955 UT WOS 000810020700001 EID SCOPUS 85131725613 DOI 10.1002/zaac.202200152 Annotation 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. Workplace J. Heyrovsky Institute of Physical Chemistry Contact Michaela Knapová, michaela.knapova@jh-inst.cas.cz, Tel.: 266 053 196 Year of Publishing 2023 Electronic address http://hdl.handle.net/11104/0332128
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