Redox properties bipyridyl metal complexes

Raman spectroscopy metal in water complexes, 309 Rare earth complexes acetylacetone synthesis, 377 guanidinium, 282 hydroxamic acids, 506 Redox properties bipyridyl metal complexes, 90 Reductive coupling nitrile metal complexes, 265 Resorcinol, 2,4-dinitro-metal complexes, 273 Rhenium complexes acetylacetone, 376 synthesis, 375, 378... 

There is much interest in transition metal polypyridyl complexes, largely due to their numerous applications in a variety of fields (247-250). In particular, ruthenium(II) tris(2,2 -bipyridyl) has been one of the most extensively studied complexes of the last decade due to its chemical stability, redox properties, excited-state reactivity, and luminescent emission (251, 252). 

In the reduction with 2,2 -bipyridyl, redox reactions are absent and the limiting stage is the transfer of the 2nd electron, [AEo being —60 to —70 mV. Reduction of the nickel(II) complex with PPhs, ( PrO)3P, PhP(OBu)2, or (PhO)3P is limited by the transfer of the 1st electron and is accompanied by comproportionation (PPh3, AEo= 90 mV) and disproportionation reactions (phosphites, AEq< 0). The redox properties of some transition metal-cinnamonitrile cyclo-phosphazene derivatives, e.g., 107-109 have been stuoied by cyclic voltammetry (CV) and controlled potential electrolysis (CPE) in aprotic media. 

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