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oai:ojs.www.eurjchem.com:article/1461 2016-09-30T03:57:42Z eurjchem:ART driver

Chelation activity of N'1,N'6-bis((E)-3,4-dihydroxybenzylidene)adipohydrazide towards some transition metal ions El-Asmy, Ahmed Abdel-Hameed Jeragh, Bakir Ali, Mayada Samir Spectra Thermal analysis Hydrazide derivatives Single crystal structure Polymetallic complexes Magnetic measurements New chelating agent, N'1,N'6-bis((E)-3,4-dihydroxybenzylidene)adipohydrazide (DBAH) was synthesized and its crystal structure was analyzed by X-ray single crystal diffractometer. Homometallic complexes of Zr(IV), Co(II), Ni(II), Cu(II), Cd(II) and heterometallic complex of Co(II)/Zn(II) or Co(II)/Zn(II)/Cd(II) have been synthesized and characterized by spectroscopic and physicochemical methods. The data confirms the formation of bi- and tetra-metallic complexes. The ligand behaves as a neutral tetradentate in the Co(II) and Ni(II) complexes; tetranegative tetradentate in Zr(IV) and Cd(II) complexes and binegative octadentate in [Co2Zn2(DBAH)Cl6] and [Co2ZnCd(DBAH-4H)(H2O)4Cl4].H2O. A tetrahedral structure was proposed for the Ni(II), Zr(IV) and Co(II)/Zn(II) complexes; square-planar for the Cu(II) complex and octahedral geometry for the Co(II) complex. The ESR spectrum confirms the proposed structure of the Cu(II) complex. The thermal analyses confirm the stability of these complexes in the range 275-418 °C. The molecular modeling of [Co2Zn2(DBAH)Cl8] was drawn and its parameters were calculated. Atlanta Publishing House LLC 2016-09-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/plain https://www.eurjchem.com/index.php/eurjchem/article/view/1461 10.5155/eurjchem.7.3.283-289.1461 European Journal of Chemistry; Vol. 7 No. 3 (2016): September 2016; 283-289 2153-2257 2153-2249 eng https://www.eurjchem.com/index.php/eurjchem/article/view/1461/pdf_1461 https://www.eurjchem.com/index.php/eurjchem/article/view/1461/2582