Nickel(II) and cobalt(II) complexes of methyl(2-aminocyclopentene-1-dithiocarboxy)-S-acetate (ACDASAMe)

Nickel(II) and cobalt(II) bis-chelates of methyl(2-aminocyclopentene-1-dithiocarboxy)-S-acetate (ACDASAMe) were synthesized and characterized by spectroscopic methods and in the case of the nickel complex, X-ray single-crystal diffraction. The ligand exhibits the (N, S) coordination mode on interacting with the metal centers. The X-ray structure of the nickel(II) complex reveals a NiN2S2 distorted square planar coordination geometry with the ligands showing a cis configuration. There is no interaction between the –CH2COOMe moieties of the ligand and the metal center, however intermolecular hydrogen bonds through the carbonyl group leads to the building of dimeric associations.

Graphical abstractThe synthesis and characterization of nickel(II) and cobalt(II) complexes of methyl(2-aminocyclopentene-1-dithiocarboxy)-S-acetate (ACDASAMe) are reported. The ligand exhibits the (S, N) coordination mode on interacting with the metal centers. The X-ray structure of Ni(II) complex exhibits a somewhat distorted NiS2N2 square planar geometry with the ligands showing a cis configuration. The dangling –CH2COOMe arms of the ligands stay away from coordination forming dimeric association through weak intermolecular hydrogen bonding between neighboring molecules.Figure optionsDownload full-size imageDownload as PowerPoint slide