

Chelation activity of N'1,N'6-bis((E)-3,4-dihydroxybenzylidene)adipohydrazide towards some transition metal ions
Ahmed Abdel-Hameed El-Asmy (1,*)



(1) Department of Chemistry, Faculty of Science, Kuwait University, Safat, 13060, Kuwait
(2) Department of Chemistry, Faculty of Science, Kuwait University, Safat, 13060, Kuwait
(3) Department of Chemistry, Faculty of Science, Kuwait University, Safat, 13060, Kuwait
(*) Corresponding Author
Received: 19 May 2016 | Revised: 27 Jun 2016 | Accepted: 02 Jul 2016 | Published: 30 Sep 2016 | Issue Date: September 2016
Abstract
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.
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DOI: 10.5155/eurjchem.7.3.283-289.1461
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Kuwait University Research Grant No. SC05/14, Kuwait
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DOI Link: https://doi.org/10.5155/eurjchem.7.3.283-289.1461

















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