Ligand-bridged dinuclear carbonyl compounds of rutheniun and osmium

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dc.contributor.advisorMoss, John Ren_ZA
dc.contributor.advisorHaines, Raymond Jen_ZA
dc.contributor.authorMushonga, Paulen_ZA
dc.date.accessioned2014-08-13T14:27:36Z
dc.date.available2014-08-13T14:27:36Z
dc.date.issued2008en_ZA
dc.descriptionIncludes abstract.en_ZA
dc.descriptionIncludes bibliographical references (leaves 26-29).en_ZA
dc.description.abstractLigand-bridged dinuc1ear carbonyl compounds of ruthenium and osmium have been successfully prepared and characterised by various analytical and spectroscopic techniques. X-ray crystal structures have been determined for the osmium complexes [OS2(CO)4(p-02CCsH4FeCsHs)2L2] {L = PPh3 (102), py (103)}. Some of the complexes were then investigated for their catalytic activity in the oxidation of cyc10hexane and octane. In this work, hydrogen peroxide was used as an oxidant and acetonitrile as the solvent. A higher selectivity for the alcohol products over the ketones was observed. The average ratio of alcohols to ketones was found to be 4.56 and 1.76 for cyc10hexane and octane respectively. The complexes [OS2(CO)6(p-02CMeh] (4) [Ru(CO)2(p-02CMe)2]n (86), [Ru2( CO )4(p-02CMe )(p-dppm h] [PF 6] (117) and [Ru2( CO)4(p -( 02CMe h(MeCN)2] (118), were tested as homogeneous catalysts for the isomerisation of terminal alkenes. Complex 4 was inactive while the complex 118 gave a 100 % conversion. It is proposed that the catalysis proceeded via the displacement of one acetonitrile ligand from the metal centre providing a vacant site onto which the substrate coordinated. The redox behaviour of the four complexes [Ru2(CO)2(p-COh(en_ZA
dc.identifier.apacitationMushonga, P. (2008). <i>Ligand-bridged dinuclear carbonyl compounds of rutheniun and osmium</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/6348en_ZA
dc.identifier.chicagocitationMushonga, Paul. <i>"Ligand-bridged dinuclear carbonyl compounds of rutheniun and osmium."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 2008. http://hdl.handle.net/11427/6348en_ZA
dc.identifier.citationMushonga, P. 2008. Ligand-bridged dinuclear carbonyl compounds of rutheniun and osmium. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Mushonga, Paul AB - Ligand-bridged dinuc1ear carbonyl compounds of ruthenium and osmium have been successfully prepared and characterised by various analytical and spectroscopic techniques. X-ray crystal structures have been determined for the osmium complexes [OS2(CO)4(p-02CCsH4FeCsHs)2L2] {L = PPh3 (102), py (103)}. Some of the complexes were then investigated for their catalytic activity in the oxidation of cyc10hexane and octane. In this work, hydrogen peroxide was used as an oxidant and acetonitrile as the solvent. A higher selectivity for the alcohol products over the ketones was observed. The average ratio of alcohols to ketones was found to be 4.56 and 1.76 for cyc10hexane and octane respectively. The complexes [OS2(CO)6(p-02CMeh] (4) [Ru(CO)2(p-02CMe)2]n (86), [Ru2( CO )4(p-02CMe )(p-dppm h] [PF 6] (117) and [Ru2( CO)4(p -( 02CMe h(MeCN)2] (118), were tested as homogeneous catalysts for the isomerisation of terminal alkenes. Complex 4 was inactive while the complex 118 gave a 100 % conversion. It is proposed that the catalysis proceeded via the displacement of one acetonitrile ligand from the metal centre providing a vacant site onto which the substrate coordinated. The redox behaviour of the four complexes [Ru2(CO)2(p-COh( DA - 2008 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2008 T1 - Ligand-bridged dinuclear carbonyl compounds of rutheniun and osmium TI - Ligand-bridged dinuclear carbonyl compounds of rutheniun and osmium UR - http://hdl.handle.net/11427/6348 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/6348
dc.identifier.vancouvercitationMushonga P. Ligand-bridged dinuclear carbonyl compounds of rutheniun and osmium. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 2008 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/6348en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Chemistryen_ZA
dc.publisher.facultyFaculty of Scienceen_ZA
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherChemistryen_ZA
dc.titleLigand-bridged dinuclear carbonyl compounds of rutheniun and osmiumen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMScen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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