Synthesis and Structural Studies on Polynuclear Metal Complexes Derived from a New Multidentate Ligand
| dc.contributor.advisor | Raju V.J.T. (PhD) | |
| dc.contributor.author | Ghiday Mulugeta | |
| dc.date.accessioned | 2018-06-21T07:49:34Z | |
| dc.date.accessioned | 2023-11-09T16:17:46Z | |
| dc.date.available | 2018-06-21T07:49:34Z | |
| dc.date.available | 2023-11-09T16:17:46Z | |
| dc.date.issued | 2000-06 | |
| dc.description.abstract | This study presents the synthesis and characterization of a new multidentate ligand H6-DHADB and its metal complexes. The ligand, H6-DHADB is a hydrated Schiff base product formed by the condensation of2, 4- Dihydroxy-5-acetyl acetophenone (H,-DAA) and 1,3- diamino propane in 3:2 mole ratio. It possesses four independent chelating sites (00, ONNO, ONNO, 00) separated by bulky phenyl groups. The metal complexes of H6-DHADB with Co(II), Ni(ll), Cu(ll), Zn(ll), Cd(Il) and Hg(lI) have been synthesized from methanolic media at pH ~8. They have been characterized on the basis of elemental analysis, thermal, conductance, IR and electronic spectral studies. The studies have shown that all the metal complexes are nonelectrolytes with metal to ligand ratios in 3: 1,2: 1 and 2: I in Co(ll), Ni(Il) and Cu(ll) complexes respectively and 4: I, 2: I, 1: 1 in Zn(ll), Cd(Il) and Hg(ll) complexes respectively. Based on IR spectral data, a variety of donor propel1ies of the ligand has been proposed. ONNO, ONNO and 00 chelation with cobalt(II); 00 and 00 chelation with nickel(II); ONNO and ONNO chelation with copper(II); 00, ONNO and 00 chelation with zinc (II) and 00 chelation with Cd(ll) and Hg(lI) have been suggested. Based on electronic spectral data cobalt(ll) complex exhibited octahedral, copper(Il) complex shows square planar structure and nickel(ll), zinc(Il), cadmuim(ll) and mercury(ll) complexes attain tetrahedral geometries. | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/2576 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa Universty | en_US |
| dc.subject | Multidentate Ligand | en_US |
| dc.title | Synthesis and Structural Studies on Polynuclear Metal Complexes Derived from a New Multidentate Ligand | en_US |
| dc.type | Thesis | en_US |