Synthesis and Characterization of Some New Zinc(II) Complexes Incorporating Heterocyclic Thiophosphates as a Ligand

Abstract

New tetracoordinated complexes of Zn (II) have been synthesized by the reaction between zinc chloride and 3-methyl-2-benzothiazolylidenamido-thiophosphoryl dichloride (L₁), (3-methyl-2-benzothiazolylidenamido)-bis-(diethylamido)thiophosphate (L₂), 3-benzyl-2-benzothiazolylidenamido thiophosphoryl dichloride (L₃), and (3-benzyl-2-benzothiazolylidenamido)-bis-(diethyl-amido) thiophosphate (L₄) in a 1:1 ratio. The complexes have been isolated and characterized by elemental analysis, electrical conductivity, and mass and IR spectral studies. The stability constants of these complexes also have been determined in aqueous solution by spectrophotometric methods.

Keywords:

• Benzothiazole
• four-membered chelates
• organophosphorus ligands
• zinc complexes

We are thankful to Central Research Drug Institute, Lucknow for extending IR and mass spectral facilities.