European Journal of Chemistry 2010, 1(4), 282-288 | doi: | Get rights and content

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Synthesis, spectroscopic and thermal characterization of quinoxaline metal complexes

Mohamed Ahmed Badawy (1) , Gehad Genidy Mohamed (2,*) , Mohamed Mohamed Omar (3) , Mamdouh Mohammed Nassar (4) , Ahmed Badr Kamel (5)

(1) Chemistry Department, Faculty of Science, Cairo University, Giza, EG-12613, Egypt
(2) Chemistry Department, Faculty of Science, Cairo University, Giza, EG-12613, Egypt
(3) Chemistry Department, Faculty of Science, Cairo University, Giza, EG-12613, Egypt
(4) Insecticides Department, Faculty of Science, Cairo University, Giza, EG-12613, Egypt
(5) Chemistry Department, Faculty of Science, Cairo University, Giza, EG-12613, Egypt
(*) Corresponding Author

Received: 19 May 2010 | Revised: 30 Oct 2010 | Accepted: 18 Sep 2010 | Published: 22 Dec 2010 | Issue Date: December 2010


The coordination behaviour of the quinoxaline ligand with N and O donation sites, derived from 3-(2-oxo-2-p-tolylethyl)quinoxalin-2(1H)-one (HL), towards some transition metal ions namely Mn(II), Fe(III), Co(II), Ni(II), Cu(II) and Zn(II) are reported. The metal complexes are characterized based on elemental analyses, IR, 1H NMR, solid reflectance, magnetic moment, molar conductance and thermal analyses (TG, DTG and DTA). The ionization constants of the quinoxaline ligand as well as the stability constants of its metal chelates are calculated spectrophotometrically at 25 oC and ionic strength = 0.1 M (1M NaCl). The chelates are found to have octahedral structure. The ligand and its chelates are subjected to thermal analyses and the different activation thermodynamic parameters are calculated from their corresponding DTG curves to throw more light on the nature of changes accompanying the thermal decomposition process of these compounds. The biological activity of the synthesized ligand and its metal complexes also are screened against the desert locust Schistocerca gregaria (Forsk) (Orthoptera-Acrididae) and its adult longevities. They showed remarkable biological activity.



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European Journal of Chemistry


Quinoxaline; Transition metal complexes; Spectroscopy; Thermal analyses; DTA/TG; Biological activity

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DOI: 10.5155/eurjchem.1.4.282-288.113

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Faculty of Science, Cairo University, Egypt



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How to cite

Badawy, M.; Mohamed, G.; Omar, M.; Nassar, M.; Kamel, A. Eur. J. Chem. 2010, 1(4), 282-288. doi:10.5155/eurjchem.1.4.282-288.113
Badawy, M.; Mohamed, G.; Omar, M.; Nassar, M.; Kamel, A. Synthesis, spectroscopic and thermal characterization of quinoxaline metal complexes. Eur. J. Chem. 2010, 1(4), 282-288. doi:10.5155/eurjchem.1.4.282-288.113
Badawy, M., Mohamed, G., Omar, M., Nassar, M., & Kamel, A. (2010). Synthesis, spectroscopic and thermal characterization of quinoxaline metal complexes. European Journal of Chemistry, 1(4), 282-288. doi:10.5155/eurjchem.1.4.282-288.113
Badawy, Mohamed, Gehad Genidy Mohamed, Mohamed Mohamed Omar, Mamdouh Mohammed Nassar, & Ahmed Badr Kamel. "Synthesis, spectroscopic and thermal characterization of quinoxaline metal complexes." European Journal of Chemistry [Online], 1.4 (2010): 282-288. Web. 28 Sep. 2023
Badawy, Mohamed, Mohamed, Gehad, Omar, Mohamed, Nassar, Mamdouh, AND Kamel, Ahmed. "Synthesis, spectroscopic and thermal characterization of quinoxaline metal complexes" European Journal of Chemistry [Online], Volume 1 Number 4 (22 December 2010)

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