عنوان المقالة:تكوين معقدات كبيرة مع ليكاندات ثنائي داي ثايو كاربميت، تحضير وتشخيص طيفي ودراسة الفعالية البايولوجية Formation of macrocyclic complexes with bis(dithiocarbamate) ligand; synthesis, spectral characterisation and bacterial activity
انعام اسماعيل يوسف/ حسن احمد حسن/ رياض محمود احمد/ محمد جابر الجبوري
English Authors
Enaam I. Yousif, Hasan A. Hasan, Riyadh M. Ahmed and Mohamad J. Al-Jeboori
Abstract
The preparation and characterisation of dithiocarbamate (DTC) ligand and its binuclear metal(II) dithiocarbamatebased
macrocyclic complexes are reported. The free ligand was prepared from the reaction of a bis-secondary
amine, CS2 and KOH. The macrocyclic bis(dithiocarbamate) complexes were synthesised using two approaches; (i)
from the reaction of the free ligand with a metal ion, and (ii) via a one-pot reaction. In the free ligand approach,
complexes were prepared by the reaction of potassium dithiocarbamate salt with the metal ions; MnII, CoII, and CuII.
In the one-pot reaction, the complexes were prepared using a bis-secondary amine, CS2, KOH and metal(II)
chloride. Ligand and its complexes were fully characterised by elemental analysis, thermal analysis, FTIR, UV-Vis,
mass spectroscopy, magnetic susceptibility, conductance, melting points, and 1H, 13C- NMR spectroscopy. These
studies revealed the formation of binuclear macrocyclic complexes of the general formula [M(Ln)]2 with tetrahedral
geometries for MnII, CoII, and square planar geometry with CuII complex. Bacterial activity of the ligands and their
metal complexes were screened for their antibacterial activity against four bacterial species (Escherichia coli,
Pseudomonas aeruginosa, Staphylococcus aureus and Bacillus stubtilis), which revealed that the complexes are
potentially more active against these bacterial strains, compared with the free ligand.
رياض محمود احمد | Riyadh Mahmood Ahmed | 12226