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Article
Synthesis and Characterization of New Complexes Fe(II), Co(II) and Ni(II) Ions with Azo Ligand Derived from 4-Aminoantipyrene

Authors: Khalida F. AL-Azawi --- Rashed Taleb Rasheed --- Liblab Sami Jassim
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2016 Volume: 19 Issue: 4 Pages: 41-47
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

The ligand (4-(7-hydroxy-4-methylcoumarin-8-ylazo)-1-phenyl-2,3-dimethyl pyrazol-5-one 4-yl) derived from 4-aminoantipyrine and 7-hydroxy-4-methyl coumarin. The synthesized ligand was characterized by 13C, 1HNMR, FT.IR and UV-Vis spectra. Complexes of Fe(II), Co(II) and Ni(II) with the ligand were prepared in aqueous methanol with a (1:2) M:L ratio. The prepared complexes have been characterized by using flame atomic absorption, FT.IR, UV-Vis spectra as well as magnetic susceptibility and conductivity measurements. On the basis of physicochemical data octahedral geometries were attributed for the complexes.

هيدروكسي 4 مثيل كيومارين - - - - ( حضر الليكند ) 4– - - - - - - - 8 ايل ازو( 1 فنيل 2,3 ثنائي مثيل بايروزول 5- - - - - اون 4 ايل( من 7 هيدروسي 4 ميثل كومارين و 4امينو انتي بارين و شخص الليكاند المحضر بواسطة اطيافالرنين النووي المغناطيسي و الاشعة تحت الحم ا رء و فوقالبنفسجية المرئية. حضرت معقدات الحديد و الكوبلت و –النيكل الثنائية الشحنة مع الليكاند في وسط الميثانول وبنسبةفلز: ليكاند (2:1) ، شخصت المعقدات المحضرة باستخداماطياف الاشعة تحت الحم ا رء و فوق البنفسجية المرئية و –تقنية الامتصاص الذري، فضلا عن قياسات الحساسيةالمغناطيسية و الت وصيلية الكهربائية و من النتائج المحصولعليها تم اقت ا رح الشكل الثماني السطوح للمعقدات المحضرة.


Article
Antioxidant Activity of Coumarine Compounds

Authors: Yasameen K. Al-Majedy --- Hiba H. Ibraheem --- Liblab Sami Jassim --- Ahmed A. Al-Amiery
Journal: Al-Nahrain Journal of Science مجلة النهرين للعلوم ISSN: (print)26635453,(online)26635461 Year: 2019 Volume: 22 Issue: 1 Pages: 1-8
Publisher: Al-Nahrain University جامعة النهرين

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Abstract

Synthesis of coumarins, that were a structurally motivating antioxidant action, was finished in our article. Four components are condensed in the synthesis 4-hydroxycoumarin, 5,5-dimethyl-1,3-cyclohexanedione, and aromatic aldehydes, using tetrabutylammonium bromide (TBAB), diammonium hydrogen phosphate (DAHP), respectively to yield target compounds(1-4). The present methods have advantages, including one-pot synthesis, excellent yields, short reaction times, and easy isolation of product. All catalysts utilized in our study could be reused several times without losing their catalytic efficiency. The structures of the synthesized compounds were elucidating by spectro-scopically methods, Infrared Spectra FT-IR and 1H and 13C Nuclear/Magnetic/Resonance Spectra and elemental analysis techniques, melting point and thin layer chromatography. The scavenging activities of individual molecules were tested vs. stable free radical(1,1-Diphenyl-2-picrylhydrazyl (DPPH)), the results were compared to the Gallic acid. The results show that most of the compounds exhibited higher antioxidant activates than the standards in different concentration range. The highest efficiency scavenging activity was found for compound 2 (88.0±1%) followed by compounds 3 (83±0.5%).The component of the integrated mixes as cell reinforcements was likewise examined.

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