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(searched for: doi:10.5155/eurjchem.6.1.44-47.1140)
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Hager Sadek El–Beshti, Yasemin Yildizhan, Hakan Kayi, Yuksel Cetin, Zelal Adigüzel, Gamze Gungor-Topcu, Zuhal Gercek,
Published: 14 November 2021
Journal of Molecular Structure; https://doi.org/10.1016/j.molstruc.2021.131928

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Mahmoud Najim Abid Al-Jibouri, Araf Ismael Jabbar, Ahmad H. Ismail
IOP Conference Series: Materials Science and Engineering, Volume 571; https://doi.org/10.1088/1757-899x/571/1/012098

Abstract:
The synthesis of a new ligand (Z)-3-((2-aminoethyl)imino)-6,7-dimethyl-3,4-dihydroquinoxalin-2(1H)-one containing quinoxaline and aliphatic ethylene moiety subunits is described. The reaction of 6,7-dimethylquinoxaline-2,3(1H,4H)-dione with ethylenediamine in glacial acetic acid as catalyst leads to the isolation of the free ligand (L), which is a Lewis base precursor. The new transition metal complexes of (L) ligand were prepared and characterized by elemental analysis and spectroanalytical techniques. The new poly dentate L Schiff base was formed up on condensation of 6,7-dimethylquinoxaline-2,3(1H,4H)-dione with ethylenediamine in glacial acetic acid as catalyst. The free ligand was fully identified with the help of elemental analyses, mass spectra,H NMR and FTIR spectra. The direct reactions of methanolic ligand (L) with the salts of manganese(II),cobalt(II),nickel(II),copper(II),zinc(II),cadmium(II) and vanadium(IV) resulted in colored precipitated which have been characterized by elemental analyses, magnetic susceptibility, molar conductivity measurements and FTIR and UV-Visible spectroscopy. The metal to ligand ratios data concluded that all structures of complexes were in 1:1 ratio with octahedral geometry for all complexes except that nickel(II) was square planner The compounds were characterized by physical and spectroscopic measurements which indicated that the ligand is probably acting as a tridentate ON2 chelating agent.
, Sankara Sabapathy Pandiaraja, Bhagatsingh Ravikumar, Shunmuganarayanan Athimoolam, Navaneethakrishnan Srinivasan, Rajaputi Venkatraman Krishnakum
Asian Journal of Applied Sciences, Volume 11, pp 83-91; https://doi.org/10.3923/ajaps.2018.83.91

, Sankara Sabapathy, Bhagatsingh Ravikumar, Shunmuganarayanan Athimoolam, Navaneethakrishnan Srinivasan, Rajaputi Venkatrama
Asian Journal of Applied Sciences, Volume 11, pp 140-150; https://doi.org/10.3923/ajaps.2018.140.150

, Sankara Sabapathy Pandiaraja, Bagathsingh Ravikumar, Shunmuganarayanan Athimoolam, Rajaputi Venkatraman Krishnakum
Asian Journal of Applied Sciences, Volume 11, pp 29-37; https://doi.org/10.3923/ajaps.2018.29.37

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