ABSTRACT
This chapter provides a brief summary of the aqueous electrochemistry of manganese compounds. Compounds and species are known with manganese in oxidation states ranging from Mn(-I) to Mn(VII). Mn(-I) is present in the ion Mn(CO)5-, while Mn(0) is found in the compound Mn2(CO)10. There is a wealth of information on electrochemical properties of manganese compounds, both in aqueous and nonaqueous media. Numerous measurements of electrode potentials of Mn(IV) oxide materials have been made. The values of the electrode potentials of a number of oxidation states of technetium were first reported by J. W. Cobble et al. Measurements of the potential of metallic technetium were carried out in sulfate and /or phthalate buffers, after various polarizations, with or without prior coating of the electrode with a film formed cathodically from pertechnetate. Rhenium compounds and complexes have been prepared in all the oxidation states between +7 and -1.
