Crystal structure of bis(μ-{2-[(5-bromo-2-oxido-benzyl-idene)amino]-eth-yl}sulfanido-κ(3) N,O,S){2,2'-[(3,4-di-thia-hexane-1,6-di-yl)bis-(nitrilo-methanylyl-idene)]bis-(4-bromo-phenolato)-κ(4) O,N,N',O'}dicobalt(III) di-methyl-formamide monosolvate.

The title binuclear Co(III) complex, [Co(2)(C(9)H(8)BrNOS)(2)(C(18)H(16)Br(2)N(2)O(2)S(2))]·C(3)H(7)NO, with a Schiff base ligand formed in situ from cyste-amine (2-amino-ethane-thiol) and 5-bromo-salicyl-aldehyde crystallizes in the space group P2(1). It was found that during the synthesis the ligand undergoes spontaneous oxidation, forming the new ligand H(2) L' having an S-S bond. Thus, the asymmetric unit consists of one Co(2)(L)(2)(L') mol-ecule and one DMF solvent mol-ecule. Each Co(III) ion has a slightly distorted octa-hedral S(2)N(2)O(2) coordination geometry. In the crystal, the components are linked into a three-dimensional network by several S⋯ Br, C⋯ Br, C-H⋯Br, short S⋯C (essentially shorter than the sum of the van der Waals radii for the atoms involved) contacts as well by weak C-H⋯O hydrogen bonds. The crystal studied was refined as an inversion twin.