Synthesis, Characterization and Biological Evaluation of New Dithiocarbamate Ligand and Its Complexes with some Metal Ions

Ahmed T Numan,Kaiss R Ibraheem,Mohammed K Ibrahim

doi:10.30526/30.3.1617

Abstract

New bidentate dithiocarbamate ligand (NaL) namely [Sodium-2-(((3-methyl -4- “(2,2,2-tri fluoro ethoxy) pyridin-2”-yl) methyl) sulfinyl)-1H-benzoimidazole -1-carbodithioate] was prepared. This free ligand was synthesized from the reaction of a (RS)-2-([3-methyl -4-(2,2,2-tri fluoroethoxy) pyridin-2-yl] methyl sulfinyl)-1H benzoimidazole, CS2 and NaOH in methanol as solvent. From reaction of dithiocarbamate salt (NaL) with metal ions (M); Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Pd(II)”, have obtained the DTC complexes at general molecular formula [M(L)2(H2O)2] and [Pd(L)2]. To characterize the ligand and its complexes, used different analyses methods such FTIR, UV-Vis, elemental microanalysis, atomic absoreption, magnetic susceptibility, conductance, melting points, 1H- 13C- NMR spectroscopy, thermal analysis and mass spectrum. These studies indicated the formation of DTC complexes which their geometries about metal centers are octahedral; except Pd-complex is square planer. The bacterial activity evaluation against investigated bacterial species indicated that the metal complexes are more active than the free ligand when compared them.

Highlights

New bidentate dithiocarbamate ligand (NaL) namely [Sodium-2-(((3-methyl -4- “(2,2,2-tri fluoro ethoxy) pyridin-2”-yl) methyl) sulfinyl)-1H-benzoimidazole -1-carbodithioate] was prepared
In this paper we report about synthesis, characterisation and bacterial evaluation of new dithiocarbamate ligand and its metal complexes
University, Iran, conductivity measurements were carried out by Philips PW digital meters conductivity in DMSO at 10-3 M, “FT-IR spectra were recorded as KBr discs in the range 4000-400 cm-1 using Shimadzu 8300s FT-IR spectrophotometer and as CsI discs in the range 400-200 cm-1”.”UV-Visible spectra were recorded by Shimadzu UV-8300 vis160A ultraviolet spectrophotometer the range of (200-1100) nm at 10-3 M in DMSO”

Summary

Introduction

New bidentate dithiocarbamate ligand (NaL) namely [Sodium-2-(((3-methyl -4- “(2,2,2-tri fluoro ethoxy) pyridin-2”-yl) methyl) sulfinyl)-1H-benzoimidazole -1-carbodithioate] was prepared. The U.V-Vis spectrum of ligand NaL in DMSO solution, Figure (2) showed two absorption peaks, the first peak at (285 nm =35087 cm-1; εmax= 2401molar-1 cm1) was assigned to π→π*

Results

Conclusion