Synthesis and Characterization of Tripodal Tetradentate Ligand Type NS3 and its Complexes with Re (V), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II)

This work represents the preparation of the starting material, 3-chloro-2-oxo-1,4-dithiacyclohexane (S) using a new method. This material was reacted with, 4-phenylthiosemicarbazide to give (H3NS3) as a tetradentate ligand H3L. New complex of rhenium (V) with this ligand of the formula [ReO(L)] was prepared. New complexes of the general formula [M(HL)] of this ligand when reacted with some metal ions where: M = Ni^(II), Cu^(II), Cd^(II), Zn^(II), Hg^(II) have been reported. The ligand and the complexes were characterized by infrared, ultraviolet–visible, mass, ^1H nuclear magnetic resonance and atomic absorption spectroscopic techniques and by (HPLC), elemental analysis, and electrical conductivity. The proposed structure for H3L with Re (V) is square pyramidal, while Ni^(II) complex was square planar geometry, and with the rest of metal ions are distorted tetrahedral.