Theoretical Study and Biological Activity of Co(II), Ni(II), Cu(II),Pd(II),Pt(IV) and Cd(II) Complexes with2- Thioxoimidazolidin-4-one Derivative

Abstract

The workcontains a theoretical treatment of the preparedligand(3-{[(Z)-(4-nitrophenyl) methyli -dene]amino}-2-thioxoimidazolidin-4-one)[L] and their metal complexes[S1-S6]in the gas phase.Hyperchem-8 program has been used to determined structural geometries of ligand and their metalcomplexes. The electrostatic potential(Ep)of the ligand was calculated,furthermore binding energy(ΔEb),the heat of formation(ΔHf),vibration spectra and bond length for the ligand and theirmetal co -mplexes were calculated by PM3methods at 298K°. The theoretically calculateddatawere agreed with those found experimentally. The antibacterial activity for free ligand and itsmetal complexes(S1-S6)were studied against two selected micro-organisms [(Staphylococcusaureus)as gram positive]and [(Escherichiacoli)as gram negative]. The minimal inhibitory concentrations(MIC)have been also studied to determine the low concentration for inhibition. The antibiotics(Amoxcillin and Ampicillin) have been chosen to compare their activity with those of thenew compounds. Furthermore the antif -ungal activity against two microorganisms (Candidaalbicans)and (Aspergillusflavus) were studied for all compounds. The results showed great activityof the complexes relative to that of free ligand.