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• W2027421166 endingPage "2418" @default.
• W2027421166 startingPage "2411" @default.
• W2027421166 abstract "Structurally characterised 2,5-bis(2-hydroxyphenyl)pyrazine (H2L) can be partially or fully deprotonated to form the complexes [(acac)2Ru(µ-L)Ru(acac)2], [1], acac− = acetylacetonato = 2,4-pentanedionato, [(pap)2Ru(µ-L)Ru(pap)2](ClO4)2, [2](ClO4)2, pap = 2-phenylazopyridine, or [(pap)2Ru(HL)](ClO4), [3](ClO4). Several reversible oxidation and reduction processes were observed in each case and were analysed with respect to oxidation state alternatives through EPR and UV-VIS-NIR spectroelectrochemistry. In relation to previously reported compounds with 2,2′-bipyridine as ancillary ligands the complex redox system [1]n is distinguished by a preference for metal-based electron transfer whereas the systems [2]n and [3]n favour an invariant RuII state. Accordingly, the paramagnetic forms of [1]n, n = −, 0, +, exhibit metal-centred spin whereas the odd-electron intermediates [2]+, [2]3+ and [3] show radical-type EPR spectra. A comparison with analogous complexes involving the 3,6-bis(2-oxidophenyl)-1,2,4,5-tetrazine reveals the diminished π acceptor capability of the pyrazine-containing bridge." @default.
• W2027421166 created "2016-06-24" @default.
• W2027421166 creator A5007237862 @default.
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• W2027421166 date "2007-01-01" @default.
• W2027421166 modified "2023-09-25" @default.
• W2027421166 title "Non-innocent behaviour of ancillary and bridging ligands in homovalent and mixed-valent ruthenium complexes [A₂Ru(µ-L)RuA₂]ⁿ, A = 2,4-pentanedionato or 2-phenylazopyridine, L²⁻= 2,5-bis(2-oxidophenyl)pyrazine" @default.
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• W2027421166 doi "https://doi.org/10.1039/b701511a" @default.
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