|
Addis Ababa University Libraries Electronic Thesis and Dissertations: AAU-ETD! >
Faculty of Science >
Thesis - Chemistry >
Please use this identifier to cite or link to this item:
http://hdl.handle.net/123456789/3396
|
| Title: | SYNTHESIS AND CHARACTERIZATION OF SOME TRANSITION METAL COMPLEXES WITH O,N,O AND O,O DONOR LIGANDS |
| Authors: | Girma, Sisay |
| Advisors: | B. S. Shyamala(Dr.) |
| Keywords: | Mixed ligand complexes
3-aminocoumarin (3-AC
4-acetylresorcinol (4-AR), Schiff base. |
| Copyright: | Jul-2011 |
| Date Added: | 17-Jul-2012 |
| Publisher: | Addis Ababa University |
| Abstract: | Novel Schiff base mixed ligand complexes of Cu(II) and Zn(II) were prepared from 3-AC and
4-AR by template synthesis. Also, new metal complexes of chromium(III), iron(III) and
copper(II) ions were synthesized with 4-AR. All the complexes were characterized by elemental
and metal ion analyses, IR and UV-Vis spectroscopy, magnetic susceptibility data and
conductance measurements.
Analytical data of the mixed ligand complexes shows a M:L ratio of 1:2 and 1:1 for copper and
zinc complexes, respectively. Based on these data, an octahedral geometry for Cu(II) complex
and a tetrahedral geometry for the Zn(II) complex was proposed. In the Cu(II) complex, the
mixed ligand acts as an O,N donor and in the Zn(II) complex, it acts as an O,N,O donor. Attempt
to synthesize the mixed ligand complexes with Cr(III), Fe(III) and Ni(II) ions were not
successful.
Complexation of chromium(III), iron(III) and copper(II) ions were carried out with 4-AR
successfully. The ligand coordinates through the phenolic oxygen and the carbonyl oxygen
atoms (i.e. the ligand behaves as O,O donor). An octahedral geometry for Cr(III) and Fe(III)
complexes and a tetrahedral geometry for the Cu(II) complex was proposed. Attempt to
synthesize the Ni(II) and Zn(II) complexes with 4-AR were not successful. |
| Description: | A thesis submitted to school of graduate studies of Addis Ababa
University in partial fulfillment of the requirements for the Degree
Of Master of Science in Chemistry |
| URI: | http://hdl.handle.net/123456789/3396 |
| Appears in: | Thesis - Chemistry
|
Items in the AAUL Digital Library are protected by copyright, with all rights reserved, unless otherwise indicated.
|
