Synthesis, Identification of Co(II), Cu(II) and Ni(II) Complexes with A Schiff Base–Azo Ligand Derived from Imidazol Derivatives, 4- Aminoacetophenon and 4- Chloroaniline and Study Their Physical Properties and Their Thermodynamic Stabilities
| Main Author: | Farhan, Aesa |
|---|---|
| Format: | Article info application/pdf Journal |
| Bahasa: | eng |
| Terbitan: |
University of Babylon
, 2019
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| Subjects: | |
| Online Access: |
https://www.journalofbabylon.com/index.php/JUBPAS/article/view/2554 https://www.journalofbabylon.com/index.php/JUBPAS/article/view/2554/1959 |
Daftar Isi:
- حضرت معقدات الكوبالت الثنائي والنحاس الثنائي والنيكل الثنائي باستخدام ليكاند آزو- قاعدة شف والتي حضرت في هذه الدراسة من تفاعل ملح الدايوزونيوم لقاعدة شف مع مشتق الايميدازول . شخصت هذه المعقدات بواسطة عدة تقنيات CHN وتقنية تحليل العناصر FTIR ومطيافية الاشعة تحت الحمراء UV.VISB.مطيافية الاشعة المرئية-البنفسجية وعينت الصفات المغناطيسية والكهربائية لهذه المعقدات كما عينت ثوابت الاستفرارية الكلية والمرحلية والخواص الثرموديناميكية وقد وجد ان كل المعقدات لها خواص بارامغناطيسية ولها توصيلية كهربائية جيدة. استخدمت طريقة النسب المولية لتعيين صيغة المعقدات وبينت النتائج انها تمتلك التركيب (1:3) ليكاند: فلز في كل المعقدات. ان التناسق كان عبر ذرة النتروجين لمجموعة الآزو وذرة النتروجين لحلقة الايميدازول وان الشكل الهندسي لهذه المعقدات d2sp3 هو ثمانية السطوح. ان ثوابت الاستقرارية المرحلية والكلية تزداد باضافة الليكاند والسبب يعود الى التأثير الكليتي لليكاند وان قيم الدوال الثرموديناميكية كانت سالبة مما يدل على ان التفاعل تلقائي والمعقدات ذات استقرارية عالية.
- The complexes of Co(II), Cu(II) and Ni(II) were synthesized by using schiff base – azo as a ligand, which were prepared under this study by the reaction between the Schiff base diazonium salt and the imidazole derevitive. They were characterized by element analysis, FTIR spectroscopy and UV.VIS. spectroscopy. Their electric conductivity and magnetic features were determined. Their stepwise and overall stability constants and their thermodynamic data ( , and ) were determined. The results showed that all the complexes have paramagnetic features and all of them have good conductivity. The formula of the complexes under this paper were suggested by using the mole ratio method which lead to the formation of (1 : 2) metal : ligand formula for all the complexes. In all the complexes the coordinated sites was through N atoms of the azo groups and N atom of the imidazol ring. The suggested geometrical shapes of the complexes was the octahedral shape due to the ( d2sp3 ) hybridization. Their stepwise stability constants were determined, it was found that for all the complexes they were increased toward the addition of ligand that because of the chelate effect. Their overall stability constants were determined, it was found that for all the complexes were high that because of the chelate effect. Their thermodynamic functions ( , and ) were had negative value, that refer to good stability for the complexes and these results were satisfied with the spontaneous reaction and high stability complexes.