Multi valence transition elements

Redox propcTties of some oxo-bridged di- and tri-nuclear complexes of the second and third transition elements. Re, Ru, Os, and Mo, are discussed with special attention to stability of the mixed-valence states. These complexes display multi-step one-election transfer processes and give fairly stable mixed-valence oxidation state. Stability of the mixed-valence states is discussed in terms of qualitative molecular orbital schemes based on dJt (metal) - prt (bridged oxygen) interactions. 

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