Wessal  M. Khamis, Taghreed  M. Musa, Anaam M.  Rasheed, Sinan M.  AL-Bayati, Bayader  F. Abbas, 
    Synthesis, Characterization and Structural Studies of Co(II), Ni(II), Cu(II) and
Cd(II) Complexes of Hydrazone Schiff Base Ligands Pyrimidine Derivative,
    Journal of Engineering and Applied Sciences,
    Volume 14,Issue 8,
    2019,
    Pages 2418-2430,
    ISSN 1816-949x,
    jeasci.2019.2418.2430,
    (https://makhillpublications.co/view-article.php?doi=jeasci.2019.2418.2430)
    Abstract: The tridentate Schiff base ligands containing donor ONO were prepared by the reaction of
2-Furaldehyde and urea or thiourea with ethyl acetoacetate to product pyrimidine derivatives (1a, 1b) which
upon treatment with hydrazine afforded the hydrazide derivatives (2a, 2b) the reaction of (2a, ab) with 3-acetyl
coumarin obtained novel Schiff base Ligands (L<sub>1</sub> , L<sub>2</sub> ) in good yield. The Ligands (L<sub>1</sub> , L<sub>2</sub> ) were characterized by 
elemental analysis (C.H.N.S), FT-IR, Uv spectroscopy, HNMR and mass spectral analysis. Complexes of Co(II),
Ni(II), Cu(II) and Cd(II) with the novel Schiff base ligands have been prepared. The prepared complexes were
identified and their structural geometries were suggested by using elemental analysis (C.H.N.S), FT-IR, UV-Vis
spectroscopy and flame atomic absorption technique in additionmagnetic susceptibility, conductivity
measurements and thermal analysis TG-DSC. The results suggest that the Schiff base Ligands (L<sub>1</sub> , L<sub>2</sub> ) 
coordinate with their tridentate O, N, O donors derived from carbonylamide and azomethine nitrogen and
carbonyl oxygen atom on the coumarin ring.
    Keywords: Pyrimidine derivative;coumarine derivative;Schiff base;transition metal complexes;spectral
studies;susceptibility