Polarographic studies have been carried out in acetone on the dithio(acetyl-acetonato)-complexes [FORMULA OMITTED] where [FORMULA OMITTED], (all d5, low-spin) and Rh(III) (d, low-spin). The iron and osmium complexes are reversibly reduced at the DME, whereas the ruthenium complex undergoes a quasi-reversible reduction. For the d5 systems the electrode reaction is believed to be [FORMULA OMITTED] However reduction of [FORMULA OMITTED] is highly irreversible and may involve adsorption or compound formation at the mercury surface. Millieoulometric studies indicate the electrode reaction is [FORMULA OMITTED]. The half-wave potentials [FORMULA OMITTED] accord with the known chemistry and spectroscopic properties of the complexes. The development of polarographic techniques for use in acetone is described in detail.
- tris(dlthioacetylacetonato)-complexes acetone