[Cu(III)L]+ and [Ni(III)L(H2O)2]+ (L = I) were prepd. from the Cu(II) and Ni(II) analogs by, chem. (K2S2O8) or anodic (Pt gauze electrode, ∼0.8 V vs. SCE) oxidn. The aq. complexes were unstable, decompg. during a few h at room temp. The oxidn. state was detd. by voltammetric and ESR studies. The stabilities of the complexes are discussed relative to those of the tetraamine macrocycle-complexed analogs.
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