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Complexes of Co(II), Co(III), Mo(VI) and Pt(II) with our previously reported biologically active ligand, triammonium N,N-diacetatedithiocarbamate, (NH₄)₃dadtc, (1) were prepared with the aim of enhancing the antifungal activity of the free ligand. Anionic Co(II) complex [Co₂(H₂dadtc)₅]⁻ (2), obtained by the simple addition of the acidic ligand solution to the aqueous solution of [Co(H₂O)₆]Cl₂ at RT, undergoes, in the presence of air, over several days, spontaneous oxidation of Co(II) to Co(III), followed by an overall chemical rearrangement, resulting in the formation of molecular Co(III) complex 3. Complex 2, [Co₂(H₂dadtc)₅]⁻, reveals a binuclear double-bridged anionic structure where the overall negative charge of the complex edifice is neutralised by an ammonium ion. Strong intramolecular antiferromagnetic coupling between two paramagnetic Co(II) centres was observed. The structure of the Co(III) complex (3 …