AAU-ETD Home
→
College of Natural Sciences
→
Browsing College of Natural Sciences by Title

Browsing College of Natural Sciences by Title

Now showing items 5811-5830 of 6237

Synthesis and Characterization of Zn(Ii) and Mn(Ii) Multinuclear Mixed Ligand Complexes Derived from Citric Acid & 2,2’-Dipyridylamine

Kefelegn, Gezahegn (Addis Ababa University, 2020-07-07)

Multinuclear complexes of Zn(II) from citric acid and 2, 2’-dipyridylamine and Mn(II) from 2, 2’-dipyridylamine were successfully synthesized by template method. All complexes were particularly colored and stable to ...
Synthesis and Chgraoterization of Different Ion-pairs [ co(py) 4Cl2 ] +X- and measurement of assooiation and aquation rate constants

Kebede, Zerihun (Addis Ababa Universty, 1988-06)

The dichlorotetrapyridineCobalt(lll) complexes ~co(PY)4C12 ~ X(X = Cl- , N~-, 01° 4 -, 1° 4 -, SCN-, N~-) were synthesized and oharacterized by using elemental analysis and speotroscopio techniques. The spectral data ...
Synthesis and Partial Characterization of Ladder and Quinoxaline-Based Co-Fluorene Low Bandgap Polymers

Bogale, Fiseha (Addis Ababa Universty, 2009-07)

Thiophene-phenylene-thiophene fused heteroarene ladder-type monomeric unit which hinders “chain folding” and allows extended conjugation was synthesized along with two variants of quinoxaline-based donor-acceptor monomeric ...
Synthesis and Physico-Chemical Studies of Polyamide Macrocyclic Metal Complexes

Ashagrie, Getinet (Addis Ababa Universty, 1999-06)

The synthesis of bis(macrocyclic) complexes bearing tetraamide groups has been achieved by template condensation reaction between propylenediatnine, formaldehyde, benzidine, and succinic acid in the molar ratio of 4:4:1:2, ...
Synthesis and Properties of Some Sulfonamide Group Containing Thiourea Derivatives

Mulatu, Dejene (Addis Ababa Universty, 2007-07)

In this work five N-arenesulphonyl-benzimidoyl-N’- thiourea derivatives were synthesized from intermediate of N-arenesulphonyl-benzimidoyl- rodanide (3) by reacting with different bascity of amines. Out of these derivatives ...
Synthesis and Structural Studies of a New Polydentate Ligand and its Ni (II) and Zn (II) Complexes

Fekadu, Tsegaye (Addis Ababa University, 2015-02-02)

A new polydentate ligand N-(2-hydroxyphenyl)-2-[(2-aminophenylamino)] acetamide, (HPAPAA) has been synthesized in the reaction between N-(2-hydroxyphenyl)-2- chloroacetamide and o-phenylenediamine. The Ni (II) and Zn ...
Synthesis and Structural Studies of Mixed Ligand Complexes Derived from Dimethylglyoximate and 4, 4'-Bipyridine Using Ni2+, Cu 2+ And Zn 2+ Metal Ions

Mamo, Diborah (Addis Ababa University, 2020-08-08)

Ni (II), Cu (II) and Zn (II) complexes have been synthesized using solvo-thermal synthesis method. Divalent Ni and Cu chlorides hydrates were reacted with dimethylglyoxime and 4, 4'-bipyridine in 1:2:2 mole ratio and zinc ...
Synthesis and Structural Studies of Multinuclear Metal Chelates Derived From a New Hetrocyclic Chelating Ligand

Asrate Engidayehu (Addis Ababa Universty, 2007-03)

2,4-dihydroxy-5-acetylacetophenone(DAAP), 2,4-dihydroxy-5-acetylacetophenone dihydrazone (DAAD), and 4,6-Bis-(1-[(4,6-dichloro-[1,3,5]-triazine-2-yl)-hydrazono]-ethyl)-benzene-1,3-diol (BDTHEBD) as starting materials were ...
Synthesis and Structural studies on Co(II) Chelate of a Terthiophene Derivative

Bogale, Yiheyis (Addis Ababa Universty, 2008-07)

A hydrated mononuclear complex [Co(H2O)2L].4H2O, where L is N,N’- bis(salicylidene)-3’,4’-diamino-2,2’:5’,2’’-terthiophene, has been synthesized and characterized by elemental analysis, molar conductance, magnetic moment ...
Synthesis and Structural Studies on Metal Complex Based on Multidentate Ligand Derived from Salicylaldehyde and Resdiacetophenone-Dihydrazone

Assayehegn, Elias (Addis Ababa Universty, 2007-08)

Copper (II) complex of N, N-Bis (salicylidene)-2, 4-dihydroxy-5- acetylacetophenone dihydrazone (BSDAAD) was synthesized and characterized by conductivity and magnetic susceptibility measurements, analytical data, IR, ...
Synthesis and Structural Studies on Metal Complexes Derived from the Reaction Between Ninhydrin and Each of Aspartic Acid and Threonine Separately in the Presence of Co (II) and Zn (II).

Kumala, Wondimagegn (Addis Ababa Universty, 2006-07)

Co (II) and Zn (II) of Ruhemann`s Purple derived from ninhydrin and each of L- Aspartic acid and L-Threonine were successfully synthesized. The two complexes were distinctly colored and stable to atmospheric conditions. ...
Synthesis and Structural Studies on Polynuclear Metal Complexes Derived from a New Multidentate Ligand

Ghiday Mulugeta (Addis Ababa Universty, 2000-06)

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 ...
Synthesis and Structural Studies on Some Transition Metal Complexes Derived from Substituted Symmetric Triazines

Dinku Worku (Addis Ababa Universty, 1999-06)

Co (II), Ni(Il), Cu(II) and Zn(II) complexes of herbicidally active AZIPROTRYN (AZP) and Hydrazinoethanol derivative of atrazine (HEATZ) have been synthesized from methanolic media at pH " 6. They have been characterized ...
Synthesis and Study of Quinalizarin Complexes with

Bizuneh, Damene (Addis Ababa Universty, 1994-06)

The complexation of 1,2,5,8-tetrahydroxyanthraquinone (quinalizarin) with some trivalent lanthanide ions: Sm(III), Tb(III), Ce(III), and La(III) has been studied spectrophotometrically and potentiometrically. The methods ...
Synthesis of Selenite and Tellurite Pased Cation Exchangers and their Selected Applications

Sisay , Tezera (Addis Ababa Universty, 1980-06)

The synthesis of zirconium selenite and thorium tellurite are reported. Zirconium selenite has been prepared by mixing 4 N HCl solution of zirconium oxychloride with 4 N HCl solution of sodium selenite, and by adjusting ...
Synthesis of Benzothiadiazole Dicarboxylic Imide- and Benzotriazole Dicarboxylic Imide-Based Polymers

Habte, Lidiya (Addis Ababa University, 2020-07-06)

Three donor-acceptor (D-A) alternating copolymers and one terpolymer were synthesized, using N-dodecyl-4,7-di(5-bromothiophen-2-yl)-2,1,3-benzothiadiazole-5,6-dicarboxylic imide (77), 4,8-bis(5-bromothiophen-2-yl)-6-dode ...
Synthesis of Carbohydrate Esters from Vernonia Galamensis Seed Oil

Alem, Addisu (Addis Ababa Universty, 2016-10)

Vernonia galamensis is one of only a few plants containing naturally occurring epoxy oils in its seeds known as vernonia oil. Seeds of vernonia galamensis produce triglyceride oil rich in trivernolin that can be converted ...
Synthesis of Hetecrocyclic Compounds Starting from 3-Amino and 3-Hydroxythioacrylamides

Areda, Alemayehu (Addis Ababa Universty, 1982-06)

The 3-amino- and 3-hydroxythioacrylamides were obtained by deprotonation and hydrolysis of l-mercaptotrimethinium perchlorates respectively. In this researeh, both the thioacrylamides and the mercapto salts were used ...
Synthesis of Iron-Iii and Chromium-Iii Based Metal-Betanin Complexes Using Betanin as a Natural Ligand Isolated from Beetroot

Gebeyehu, Aklilu (Addis Ababa University, 2020-07-07)

The aim of this research work was to isolate betanin from beetroot (Beta vulgaris L.), investigate the antioxidant activity of betanin, synthesis of betanin-iron (III) and betanin-chromium (III) complexes and characterization. ...
Synthesis of Low Bandgap Alternating Copolymers Based on Fluorene-Quinoxaline and Benzothiadiazole Units

Mulugeta, Endale (Addis Ababa Universty, 2010-07)

Donor/Acceptor-Copolymers, as so-called “low-band-gap” π-conjugated polymers, have been widely investigated and applied in different areas such as organic photovoltaics (OPVs), organic light emitting diodes (OLEDs) and ...

Now showing items 5811-5830 of 6237

Search AAU-ETD

Browse

All of AAU-ETD
This College
- By Issue Date
- Authors
- Titles
- Subjects

Browsing College of Natural Sciences by Title

Browsing College of Natural Sciences by Title

Search AAU-ETD

Browse

All of AAU-ETD

This College

My Account