Synthesis and Chgraoterization of Different Ion-pairs [ co(py) 4Cl2 ] +X- and measurement of assooiation and aquation rate constants
| dc.contributor.advisor | Retta, Negussie (PhD) | |
| dc.contributor.author | Kebede, Zerihun | |
| dc.date.accessioned | 2018-06-27T12:40:46Z | |
| dc.date.accessioned | 2023-11-09T16:18:17Z | |
| dc.date.available | 2018-06-27T12:40:46Z | |
| dc.date.available | 2023-11-09T16:18:17Z | |
| dc.date.issued | 1988-06 | |
| dc.description.abstract | 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 for complexes in the UV, Vis ("'" ~.../ J- I ), and IR ( \t (Co-Cl), V(Co-N» regions have been determined. From conduotivity measurement equivalent conductivity at infinite dilution ( ~) and association constants (KA) were estimated in various solvents. " Non-linear oorrelation of the association conetant of the medium has been shown. Larger assooiation constants for 104- and SCN-, whereas lower association constants for NO~- and Cl- salts were found. Rates of aquation of the complexes were measured in water as a function of Co-solvents (50:50); (v/v), and with the different composition of ethanol; and faster rate of aquations were Observed for SCN- and NO~- and slower for 104- oounter ions. The nuoleophilic order of the oounter ions of the complexes was also established. The increasing order of the nuoleophilicity of the oounterions was found as follows:SON- < No-3 < CI< CIO4 –C<N-3 | en_US |
| dc.identifier.uri | http://etd.aau.edu.et/handle/12345678/4226 | |
| dc.language.iso | en | en_US |
| dc.publisher | Addis Ababa Universty | en_US |
| dc.subject | Co(py) 4Cl2 | en_US |
| dc.title | Synthesis and Chgraoterization of Different Ion-pairs [ co(py) 4Cl2 ] +X- and measurement of assooiation and aquation rate constants | en_US |
| dc.type | Thesis | en_US |