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تحضير وتشخيص ليكاندات ازو جديدة غير متجانسة الحلقة مشتقة من 5,4 - ثنائي فنيل اميدازول ومعقداتها مع بعض الايونات الفلزية == Synthesis And Characterization of New Heterocyclic Ligands Based On 4,5 - Diphenyl Imidazole And Their Complexes With Some of Metal Ions
Author name:
اسراء نور كاظم وتوت
Supervisor name:
حسين عبد محمد صالح
General topic:
Chemistry
Specific topic:
Chemistry
Degree:
Master
University:
University of Babylon - College Of Science
Language:
Arabic
University location:
Babylon
First pages:
25T1477 - p.pdf
Abstract:
تضمن العمل تحضير ليكاندين جديدين من ليكاندات الازو العضويه غير المتجانسه المشتقة من البنزامبدازول الاول هو اليكاند 2'] - 2 - (بنزايميدازوليل) ازو [ - 6,4 - ثنائي كلورو فينول Benzimidazolyl) Azo] - 4,6 - dichloro phenol (BIADClP)) 2 - [2' - والليكاند الثا | This study deals with the preparation of two new ligands from the heterogeneous organic azo ligands drived from Benzimidazol.The first) 2 - [6 - Benzimidazolyl) Azo] - 2,4 - dichloro phenol (BIADClP). The second is 2 - [6 - (benzimidazolylazo)] - 2,4 - dibromo phenol(BIADBrP).The heterogeneous chain in both ligands includes two nitrogen atoms. These two ligands have been identification by the proton nuclear magnetic resonance spectra (1H - NNMR) ,the mass spectrum, infrared, visibale ultraviolet as well as the analysis of the micro - elements (C.H.N).And two new series of the solid canine complexes for these ligands. The first series includes six solid complexes of the ligand (BIADClP) with the metallic ions Co(II), Ni(II), Cu(II), Zn(II), Cd(II) and Hg(II). The second series includes the preparation of six solid complexes of the ligand (BIADBrP) with the metallic ions mentioned above. The effect of the solvent and the complexes stsbility have been studied on the prepared ligands with the passage of time starting from the moment of the metallic ion solution reaction with the ligand solution and up to 170 minutes. Also, the stability constants for these complexes have been calculated spectrally by visbale - ultraviolet spectra.All results show that these complexes have high stability. The infrared spectra of the prepared complexes have been studied and when compared with the free ligand spedtra give obvious changes as these spectra show new bands not already found in the spectra of both ligands and this is due to the occurance of the correlation between the metallic ions under study with the donar atoms [the nitrogen atom azo group near the heterogeneous chain (N3) and nitrogen atom benzimidazole molecule (N3) , the oxygen atom of hydroxyl group in the heterogenous chain ] in the ligand molecule whereas the other band suffered from obvious changes in shape, intensity and location and this is a proof on the occurance of consistency process between the metallic ions under study and the tow ligands. Atomic absorption spectrometer is used for assigning percentages of the metallic ions in the prepared complexes as well as the analysis of micro - elements (C.H.N). These results indicate the great consistency between the percentages theoretically calculated and practically gained. The magnetic sensitivity indicated that Ni(II) - complex and Cu(II) - complex for both ligands have baramagnatic characteristics whereas the Co(III) - complex, Zn(II) - complex, Cd(II) - complex, Hg(II) complex have adia magnetic characteristics. Also , the study deals with the molar conductivity of the canine complexes dissolved in DMF nad ethanol in a concentration (1×10 - 3) molar and in lap temperature. The results show that the complexes of Ni(II) , Cu(II), Zn(II), Cd(II), Hg(II) do not have ionic characteristics and they are solution of non - electrolytes nature whereas the complexes of Co(III) and for both prepared ligands (BIADClP) and (BIADBrP) have ionic characteristics of the electrolytes nature of type (1 : 1) whereas other remaining complexes do not have any ionic characteristics. Throughout the results that have been reached at, certain structural forms for the canine complexes have been suggested.It has been indicated that the azo Benzimidazol ligands under study behave as tridentate ligands where the consistency happens through the N atom benzimidazole chain (N3) and N azo group far from the heterogeneous chain (N3) oxygen hydroxyl group of the homogeneous chain which leads to forming canine hexagonal complexes having octahydral as steric form.The hybridization of these complexes is d2sp3 concerning Co(III) - complexes of the ligands (BIADClP) and (BIADBrP) whereas the other complexes have the hybridization sp3d2 with the tow prepared ligands under syudy. Moreover, the study deals with the biological activity of these ligands and metallic complexes in the growth of four types of bacterial spores (germs) by using the solvent DMSO and deployment technology as anti - bacterial such as Staphylococcus aureuse and Staph.lentus representative for Gram positive bacteria and enterobacte and Escherichia coli representative for Gram negative bacteria. It is found that ligands and there complexes have different effect as antidepressants in the inhibition and the growth of bacteria under study wheras the ligand (BIADClP) gave the ability in inhibition of the growth of bacteria more than the ligand (BIADBrO) this is due to the change of substituted group on the homogeneous chain and their different in both ligands which led to the emergence of such difference in the inhibition and growth of bacteria.
