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An investigation into the complex formation and potential solvent extraction of Os(IV/III) with N, N - dialkyl - N′- acyl(aroyl)thioureas
Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2006.
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Stellenbosch : University of Stellenbosch
2006
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| _version_ | 1867613812657487872 |
|---|---|
| access_status_str | Open Access |
| author | Klopper, Reynhardt |
| author2 | Koch, K. R. |
| author_browse | Klopper, Reynhardt Koch, K. R. |
| author_facet | Koch, K. R. Klopper, Reynhardt |
| author_sort | Klopper, Reynhardt |
| collection | Thesis |
| dc_rights_str_mv | University of Stellenbosch |
| description | Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2006. |
| format | Thesis |
| id | oai:scholar.sun.ac.za:10019.1/2762 |
| institution | Stellenbosch University (South Africa) |
| last_indexed | 2026-06-10T12:42:05.565Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from SUNScholar — Stellenbosch University Repository |
| publishDate | 2006 |
| publishDateRange | 2006 |
| publishDateSort | 2006 |
| publisher | Stellenbosch : University of Stellenbosch |
| publisherStr | Stellenbosch : University of Stellenbosch |
| record_format | dspace |
| source_str | SUNScholar — Stellenbosch University Repository |
| spelling | oai:scholar.sun.ac.za:10019.1/2762 An investigation into the complex formation and potential solvent extraction of Os(IV/III) with N, N - dialkyl - N′- acyl(aroyl)thioureas Klopper, Reynhardt Koch, K. R. University of Stellenbosch. Faculty of Science. Dept. of Chemistry and Polymer Science. Dissertations -- Chemistry Theses -- Chemistry Ligands Complexes Complex compounds Extraction (Chemistry) Thesis (MSc (Chemistry and Polymer Science))--University of Stellenbosch, 2006. This study involved the preliminary investigation into the potential liquid-liquid extraction of Os(IV/III) from hydrochloric acid solutions with ligands of type N,N-dialkyl-N′-acyl(aroyl)thioureas (HL), and ultimate selective pre-concentration and separation of Os(IV/III) from the other platinum group metals. Investigations have also been focused towards understanding the speciation of Os(IV) in hydrochloric acid medium. A series of osmium complexes with ligands of type HL have been synthesised and characterised. This has been done with a view towards understanding the interaction of Os(IV/III) with the HL ligands, and what the resultant stereochemical influences would be on the solvent extraction capabilities of the ligands. The structures of two novel osmium-containing compounds have been verified by means of X-ray crytallography. Firstly, the ion pair OsCl6[(C4H9)4N]2 was obtained as a result of liquid-liquid extraction experiments. Secondly, the only known example (in our knowledge) of an Os(III) - N,N-dialkyl-N′- aroylthiourea complex, in this case tris(N,N-diethyl-N’-benzoylthioureato)osmium(III), was successfully synthesised and characterised. Lastly, preliminary studies into the substitution reactions of ruthenium-polypyridine complexes with N,N-dialkyl-N′-acyl(aroyl)thioureas were conducted. A series of cis-bis(2,2′-bipyridine)(N,N-dialkyl-N′-acyl(aroyl)thioureato)ruthenium(II) complexes have been successfully synthesised and characterised. The electronic absorption behaviour of the formed complexes have been investigated in detail via UV-Vis spectrophotometry. 2006-10-12T07:37:26Z 2010-06-01T08:57:39Z 2006-10-12T07:37:26Z 2010-06-01T08:57:39Z 2006-03 Thesis http://hdl.handle.net/10019.1/2762 University of Stellenbosch 1913681 bytes application/pdf application/pdf Stellenbosch : University of Stellenbosch |
| spellingShingle | Dissertations -- Chemistry Theses -- Chemistry Ligands Complexes Complex compounds Extraction (Chemistry) Klopper, Reynhardt An investigation into the complex formation and potential solvent extraction of Os(IV/III) with N, N - dialkyl - N′- acyl(aroyl)thioureas |
| title | An investigation into the complex formation and potential solvent extraction of Os(IV/III) with N, N - dialkyl - N′- acyl(aroyl)thioureas |
| title_full | An investigation into the complex formation and potential solvent extraction of Os(IV/III) with N, N - dialkyl - N′- acyl(aroyl)thioureas |
| title_fullStr | An investigation into the complex formation and potential solvent extraction of Os(IV/III) with N, N - dialkyl - N′- acyl(aroyl)thioureas |
| title_full_unstemmed | An investigation into the complex formation and potential solvent extraction of Os(IV/III) with N, N - dialkyl - N′- acyl(aroyl)thioureas |
| title_short | An investigation into the complex formation and potential solvent extraction of Os(IV/III) with N, N - dialkyl - N′- acyl(aroyl)thioureas |
| title_sort | investigation into the complex formation and potential solvent extraction of os iv iii with n n dialkyl n acyl aroyl thioureas |
| topic | Dissertations -- Chemistry Theses -- Chemistry Ligands Complexes Complex compounds Extraction (Chemistry) |
| url | http://hdl.handle.net/10019.1/2762 |
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