Noncomplementary oxidation-reduction mechanisms

Reductants with the next stable oxidation state two units higher are formally two-electron reductants e.g., Sn(ll), T1(I) and Pt(II). Reactions of Pt(II) usually are with Pt(lV) complexes and as a result have the stoichiometry of substitution processes (the reduction of Au(lII) by Pt(Il) occurs]. The major problem in assessing reactivity patterns in these reactions is the variety of rate laws and paucity of data. Because noncomplementary reactions produce unstable oxidation states that react by a variety of mechanisms, rate laws are often not comparable reactivity patterns are highly dependent on the oxidant in ways that are not yet analyzable. 

Multiple-oxidation-state reagents are ideal for catalysis of noncomplementary reactions, e.g., in the Sn reduction of Fe catalyzed by the [Taj CluJ cluster which proceeds by the mechanism ... 

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See also in sourсe #XX -- [ ]

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