Accession Number : ADA186290

Title :   Binding of Pentaammineruthenium(II) Residues to the Tris(bipyrazine)ruthenium(II) Cation.

Descriptive Note : Technical rept. Aug 86-Aug 87,

Corporate Author : YORK UNIV NORTH YORK (ONTARIO) DEPT OF CHEMISTRY

Personal Author(s) : Toma, Henrique E ; Auburn, Pamela R ; Dodsworth, Elaine S ; Golovin, M N ; Lever, A B

PDF Url : ADA186290

Report Date : Aug 1987

Pagination or Media Count : 36

Abstract : A series of (NH3)5Ru) (bpz))2n+ (n=1,2) and (Ru(bpz) 3 (Ru(NH3)n)2+2n (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 pentaammineruthenium(II) groups in the tris(bipyrazine) 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 ((NH3)5Ru) n (bpz)2n+ complexes. (Keywords: Pentaammineruthenium, Tris(bipyrazine) ruthenium cation, Peripheral binding, Electronic spectra, Charge transfer spectra, Electrochemistry, Ruthenium.

Descriptors :   *CHARGE TRANSFER, *RUTHENIUM, ABSORPTION SPECTRA, BAND SPECTRA, CYCLES, ELECTROCHEMISTRY, ELECTRONICS, IONS, SOLUTIONS(MIXTURES), SPECTRA, VOLTAMMETRY, WATER

Subject Categories : Organic Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE