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Synthesis and characterization of tri- and tetra-metallic complexes of N'1,N'4-bis((E)-3,4-dihydroxybenzylidene)-succinohydrazide El-Asmy, Ahmed Abd-Elhamied Jeragh, Bakir Ali, Mayada Samir Bis(hydrazones) Metal complexes Thermal analysis Magnetic moment X-ray crystallography Tetrametallic complexes Single crystal of N'1,N'4-bis((E)-3,4-dihydroxybenzylidene)succinohydrazide (SHBH) was grown by slow evaporation method. Its, Co(II), Ni(II), Cu(II), Zn(II), Co(II)/Zn(II), Ni(II)/Zn(II) and Cu(II)/Zn(II) complexes have been prepared and characterized by elemental analysis, UV-Vis, IR, NMR, MS spectra, thermal and magnetic measurements. The data confirm the formation of tri- and tetra-metallic complexes (homo- and hetero-nuclear). The ligand behaves as a tetranegative hexadentate in the Co(II)/Zn(II) complex; hexanegative hexadentate in the Co(II) complex and hexanegative octadentate in the tetrametallic complexes. A square-planar for [Co3(SHBH-6H)(H2O)6], [Cu4(SHBH-H)(H2O)4(OAc)2]⋅3H2O, [Ni3Zn(SHBH-6H)(H2O)6Cl2]⋅H2O and [Cu3Zn(SHBH-6H)(H2O)6Cl2] and tetrahedral for [Ni4(SHBH-H)(H2O)4(OAc)2]⋅6H2O, [Zn3(SHBH-4H)-(H2O)4Cl2]⋅2H2O and [Co2Zn(SHBH-6H) (H2O)6Cl2]⋅2H2O were suggested based on the magnetic and spectral data. The TGA data confirm hydrated and coordinated water as well as the final product. The mass spectra depict their molecular ion peaks and the isotopic species of each complex. It is found that the homometallic complexes are highly stable than the heterometallic complexes. The calculated energies for [Co2Zn(SHBH-4H)(H2O)4Cl2].2H2O are higher than [Co3(SHBH-6H)-(H2O)6] indicating that the three Co stabilized the complex. Atlanta Publishing House LLC 2016-03-31 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/plain https://www.eurjchem.com/index.php/eurjchem/article/view/1356 10.5155/eurjchem.7.1.81-90.1356 European Journal of Chemistry; Vol. 7 No. 1 (2016): March 2016; 81-90 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/1356/pdf_1356 https://www.eurjchem.com/index.php/eurjchem/article/view/1356/2570