J. Launay, Myriam. Tourrel-Pagis, J. Lipskier
Mar 1, 1991
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Inorganic Chemistry
Abstract
The complexation of 4,4'-azopyridine by the pentaammineruthenium(II) group is described. The metal sites are coordinated to the pyridyl nitrogen atoms and interact through the conjugated azo linkage. Upon oxidation, an intervalence absorption is detected, but it is unresolved with respect to the nearby metal-to-ligand charge-transfer band. The acidification of the binuclear pentaammineruthenium(II) complex gives rise to a pH induced intramolecular redox reaction yielding a ruthenium(III) complex of the reduced form of 4,4'-azopyridine, i.e. 1,2-bis(4-pyridyl) hydrazine