Electrochemical Parameterization of Rhenium Redox Couples

The observed rhenium potentials for ReIVIII, ReIIIII and ReIII reversible couples, for mononuclear species, are analyzed in terms of the electrochemical parameterization scheme based upon the RuIIIII couples. Two independent sets of ReIII potentials are observed, which, if extended, would cross the ReIIIII correlation line. The possible significance of these sets is explored. The ReIVII couple correlation is roughly parallel to one of the ReII I correlation lines. The analysis leads to some interesting avenues for future synthetic studies.