The compound(5-phenyl-1,3,4-thiadiazole-3-one) react with dibenzylamine and formaline to form new mannich base {N(2-(5-phenyl-1,3,4-thiadiazole-3-one)methyl) dibenzylamine} (DB).The product was characterized by (FT-IR) Spectroscopy and thermal analysis(TG-DTG). (DB) act as a ligand coordinating with some transiton metal ions{Co(II), Ni(II), Cu(II), Pd(II), Cr(III), Fe(III), Ru(III), Rh(III), Au(III), and Pt(IV)} through the oxygen of carbonyle group and the nitrogen of the amino methyl group.The steroochemistry around the metal ion has been suggested using flame atomic absorption, (FT-IR) and (UV-Vis) Spectroscopy, in addition to magnetic susceptibility , conductivity measurement and thermal analysis(TG-DTG). The study of the nature of the complexes formed in (ethanolic solution) following the mole ratio method, gave results which were compared successfully with those obtained from solid state studies. The apparent stability constant of the complexes have been studied with the time and their color were stable for more than (6) hours, as well as the molar absorptivities have been calculated.The antibacterial activity for the ligand and their metal complexes were studied against four selected microorganisms [(Pseudo monase aeruginos) and (Klesbiella pneumonia) as gram negative] and [(Streptococcus faecalis) and(Bacillus subtlus) as gram positive]. The minimal inhibitory concentration (MIC) have been also studied to determined the low concentration for inhibition. Further more the antifungl activity against two microorganism (Candida albicans and Aspergillus flavus) were studied for the ligand and their metal complexes.

The present work includes the synthesis of mannich and Schiff bases [dichloro(N{3-(5furfuralidene)-1,3,4-thiadiazole-2-hione} methylpyrazole)] cadimium(II)[A 3 ], by reacting (5-amino-2-thione-1,3,4-thiadiazole) with furfuraldehyde and pyrazol to form new mannich base [3-pyrazole amino methyl-2-thione-5-amino-1,3,4-thiadiazole][A 1 ].Reaction of this derivative with cadimium chloride to give complex with tetrahedral geometry [dichloro(N{3-(5-amino-2-thione-1,3,4thiadiazole)} methyl pyrazole)]Cadmium(II)[A 2 ] ,this [A 2 ] complex on further reaction with furfuraldhyde to give new Schiff base compound [A 3 ]. The products [A 1 ,A 2 and A 3 ] were characterized by FT-IR and elemental analysis (C.H.N).[A 3 ]act as aligand coordinating with various valent metal ions {Mn(II), Pd(II), Fe(III), Au(III) ,V(IV) and Pt(IV)}.The prepared complexes were identified and their structural geometries were suggested by using elemental analysis (C.H.N), Flame atomic absorption technique, FT-IR and UV-Vis Spectroscopy , in addition to magnetic susceptibility and conductivity measurements. The study of the nature of the complexes formed in mixture of chloroform-ethanol solution, following the mole ratio method, gave results which were compared successfully with those obtained from solid state studied. The apparent stability constant of the complexes have been studied with the time and their color were stable for more than (4) hours, as well as the molar absorptivities have been calculated. the antibacterial activity for the ligand (A 3) and their metal complexes (R 1-R 6) were studied against two selected microorganisms (Shigella flexneri, as gram negative) and (Staphylococcus aurous, as gram positive), also the minimal inhibitory concentration (MIC) have been studied to determined the low concentration for inhibition. Further more the antifungi activity against two microorganism (Candida albicans and Aspergillus flavus) were studied for the ligand and their metal complexes.

No abstract

The photostabilization of polystyrene (PS) films by (4-amino-5-(2-(6-methoxynaphthalen-2yl)piperidino)-1,2,4-triazole-3-thion(L) compounds was investigated. PS films containing concentration of complexes 0.5% by weight were produced by the casting method from chloroform as a solvent. The photostabilization activities of these compounds were determined by monitoring the carbonyl and hydroxyl indices with irradiation time. The photostabilization of PS films by prepared complexes was investigated. The PS films containing concentration of complexes 0.5% by weight were produced by the casting method from (CHCl3) solvent. The photodegradation of the obtained films was investigated using UV-vis. spectra. The photostabilization activity of these compounds was determined by calculating the photodecomposition rate constant (kd) for the modified PS.

In this work lactone (1) was prepared from the reaction of amino acid with acetic anhydride which upon treatment with hydrazine afforded the lactame (2). The reaction of (2) with 5nitroisatine obtained a new Schiff 's base (L) in good yield. Complexes of Pd(II), Ru(III), Rh(III), Au(III) and Pt(IV) with the new Schiff 's base (L) have been prepared .The compounds [1,2] were characterized by FT-IR , UV Spectroscopy, as well as the ligand (L) characterized by the same technique with elemental analysis (C.H.N). The prepared complexes were identified and their structural geometries were suggested by using elemental analysis (C.H.N), FI-IR and UV-Vis Spectroscopy, in addition to magnetic susceptibility and conductivity measurements. Metal to ligand [M:L] ratio was obtained for all complexes in (ethanol) using molar ratio method, which gave comparable results with those obtained for the solid complexes. As well as the apparent stability constant of the complexes have been studied with the time and their color were stable for more than (4) hours, Further more the molar absorptivites have been calculated. The antibacterial activity for the ligand (L) and their metal complexes were studied against three selected microorganisms (Klesbsiella Pneumoniae, Staphylococcus aurous and Shigella flexneri), as well as the minimal inhibitory concentration (MIC) have been studied to determined the low concentration for inhibitor.