The ligand 2,2′-[(E)-diazene-1,2-diyldicarbonothioyl]diphenol has been synthesised in situ by aerial oxidation of o-hydroxythiobenzhydrazide [H(htbh)] in presence of rhodium(III) in DMSO. Each ligand binds two RhO2+ ions through its N and S atoms and the O atom of its deprotonated hydroxy group. Each RhO2+ contains two cis-RhO bonds. The sixth coordination site of each rhodium(V) is occupied by the O of DMSO.
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