Nickel(II) and cobalt(II) complexes with thiazolidine-2-thione

Abstract

Complexes of thiazolidine-2-thione (ttz) were prepared and studied by magnetic techniques and u.v. visible, and i.r. spectroscopy. Pseudotetrahedral complexes [M(ttz)₂X₂] are formed with CoX₂(X = Cl, Br, or I) and Nil₂, while octahedral or distorted octahedral complexes [M(ttz)₂X₂] are formed with NiX₂(X = Cl or Br). The ‘inner’ complex [Ni(C₃H₄NS₂)₂] has a distorted square-planar structure. It appears that this ligand co-ordinates through the sulphur heteroatom in tetrahedral complexes and through both sulphur atoms in octahedral ones.