انعام اسماعيل يوسف/ حسن احمد حسن/ رياض محمود احمد/ محمد جابر الجبوري
English Authors
Enaam I.Yousif, Hasan A.Hasan, Riyadh M.Ahmed, Mohamad J.Al-Jeboori
Abstract
A range of new binuclear metal(II) dithiocarbamate-based macrocyclic
complexes is reported. The formation of complexes was achieved either by
the reaction of the free ligand with ametal ion or via a one-pot reaction. The
preparation of the bis-amine precursors (A and B) was achieved through
several synthetic routes. The reaction of bis-amine precursor with CS2 in
presence ofKOHyielded in the formation of free ligand namely; potassium
2,2'-(biphenyl-4,4'-diylbis(azanediyl)) bis(1-chloro-2-oxoethane-2,1-diyl)
bis(cyclohexylcarbamodithioate) (L1) and potassium 2,2'-(biphenyl-4,4'-
diylbis(azanediyl)) bis(1-chloro-2-oxoethane-2,1-diyl) bis(isopropylcarbamodithioate)
(L2). Physico-chemical techniques were used to
characterised ligands and their complexes. These include; elemental analysis,
thermal properties, FTIR,UV-Vis,mass spectroscopy, magnetic susceptibility,
conductance, melting points, and 1H, 13C-NMR spectroscopy. These studies
indicated the preparation of binuclear macrocyclic complexes of the general
formulae [M(Ln)]2 (M= MnII, CoII, NiII, CuII, ZnII and CdII; n = 1 or 2) with
tetrahedral arrangement for MnII, CoII, ZnII and CdII, and square planar
geometries with NiII and CuII complexes. Bacterial activity of the ligands
and their metal complexes were tested against four bacterial species
(Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and
Bacillus stubtilis), which indicated that the complexes are potentiallymore
active against these bacterial strains, compared with the free ligands.
رياض محمود احمد | Riyadh Mahmood Ahmed | 11347