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Characterization of a Mixed-Valence Ru(II)/Ru(III) Ion-Pair Complex. Unexpected High-Frequency Electron Paramagnetic Resonance Evidence for Ru(III)–Ru(III) Dimer Coupling

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journal contribution
posted on 22.05.2020, 19:13 by Olga Impert, Anna Kozakiewicz, Grzegorz Wrzeszcz, Anna Katafias, Alina Bieńko, Rudi van Eldik, Andrew Ozarowski
In this contribution, we report the synthesis and full characterization of the first mixed-valence Ru­(II)/Ru­(III) ion-pair complex, [RuII(bipy)2­(pic)]+­[cis-RuIIICl2(pic)2], in the solid state and in aqueous solution, where bipy = 2,2′-bipyridine and pic = picolinate. In addition, unexpected high-frequency electron paramagnetic resonance evidence for interactions between two neighboring Ru­(III) ions, resulting in a triplet state, S = 1, was found.