Binding of Pentaammineruthenium(II) Residues to the Tris(bipyrazine)ruthenium(II) Cation.
Technical rept. Aug 86-Aug 87,
YORK UNIV NORTH YORK (ONTARIO) DEPT OF CHEMISTRY
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A series of NH35Ru bpz2n n1,2 and Rubpz 3 RuNH3n22n n 1,3,6, bpz bipyrazine complexes has been synthesized and characterized by means of electronic spectra, 1H NMR, cyclic voltammetry and spectroelectrochemistry. The complexes are very stable and inert in aqueous solution. The peripheral pentaamminerutheniumII groups in the trisbipyrazine series exhibit strong absorption bands in the visible, around 490 and 660 nm, ascribed to metal-to-ligand charge-transfer transitions. The attached ions can be reversibly oxidized, with formal potentials of approximately 0.65 V versus NHE, in comparison to 0.52 V for the NH35Ru n bpz2n complexes. Keywords Pentaammineruthenium, Trisbipyrazine ruthenium cation, Peripheral binding, Electronic spectra, Charge transfer spectra, Electrochemistry, Ruthenium.
- Organic Chemistry