Summary
A series of mixed-tris chelates of OsIII and OsIV of the general formula [OsDQ2]0/1+ [D =β-ketoenolates (D1-D3) or tropolonate (D4); Q = deprotonated 8-quinolinol] has been prepared and characterized by physico-chemical and spectroscopic methods. In MeCN solution the OsN2O4 unit displays reversible OsIV-OsIII and OsIII-OsII couples in the ca. - 1.2 to + 0.3 V range versus s.c.e. An irreversible oxidative response corresponding to a higher degree of oxidation is also observed at ca. 1.6 V. The chemistry in different oxidation states is discussed in terms of the electrochemical results.
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Roy, B.K., Mallick, T.K., Das, P.K. et al. Heteroleptic tris-complexes of osmium(III/IV)8-quinolinolates: synthesis, characterization and link-up of oxidation levels. Transition Met Chem 18, 89–92 (1993). https://doi.org/10.1007/BF00136059
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DOI: https://doi.org/10.1007/BF00136059