cis-Bis(bipyridine)(dimethylglyoxime)ruthenium(II): an electrochemical and spectroscopic investigation of proton-coupled electron transfer

Reaction of cis-[Ru(bpy) 2(Cl) 2] (bpy=2,2′-bipyridine) with AgSO 3CF 3 then dimethylglyoxime (dmgH 2) results in the formation of cis-[Ru(bpy) 2(dmgH 2)] 2+. The cis geometry of the complex is confirmed by the asymmetry of the 1H and 13C NMR spectra. The oxime ligand of the isolated complex is doub...

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Bibliographic Details
Published in:Inorganica Chimica Acta 2000-05, Vol.303 (2), p.199-205
Main Authors: Bell-Loncella, Elisabeth T., Bessel, Carol A.
Format: Article
Language:English
Subjects:
Dimethylglyoxime complexes
Electrochemistry
Ruthenium complexes
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Summary:Reaction of cis-[Ru(bpy) 2(Cl) 2] (bpy=2,2′-bipyridine) with AgSO 3CF 3 then dimethylglyoxime (dmgH 2) results in the formation of cis-[Ru(bpy) 2(dmgH 2)] 2+. The cis geometry of the complex is confirmed by the asymmetry of the 1H and 13C NMR spectra. The oxime ligand of the isolated complex is doubly protonated, enabling the complex to undergo two acid dissociations with p K a 1 4.60 and p K a 2 7.33. The potential versus pH diagram (Pourbaix diagram) shows that the complex is capable of up to two proton and two electron transfers.
ISSN:0020-1693
1873-3255
DOI:10.1016/S0020-1693(00)00034-7