Abstract The preparation of the mixed-ligand Re V complexes [Re (O)(κ 3-SSS)(κ 1- Simz)](1),[Re (O)(κ 3-SSS)(κ 1-Simz)]· HCl (2) and [Re (O)(κ 3-SSS)(κ 1-SimzCOGlyGly)](3) are described. These [3+ 1] type compounds are stabilized by tridentate bis (2- mercaptoethyl) sulfide (HSSSH) and by monodentate functionalized thioimidazolyl ligands. Complexes 1, 2 and 3 were fully characterized by IR and 1 H NMR spectroscopy, and by X ...