The reactions of diphenylcarbazide and diphenylcarbazone with cations : Part IV. Cations of Mn,Fe, Co,Ni, Cu,Zn, Cd,Sn And Pb

Of the cations mentioned in the title, only Pb(IV) and Sn(IV) do not react with diphenylcarbazone. The compositions of the carbazone complexes were determined by Job's method; the formula proved to be M(HD)_n according to the valence of the cation. Diphenylcarbazide forms metal complexes only after its oxidation to diphenylcarbazone. Oxidation of carbazide by the metal ion itself occurs with copper(II) and iron(III).