Pyrazolyl palladium complexes with heterocyclic carbonyl linkers as catalyst precursors for ethylene and phenylacetylene polymerization.

dc.contributor.advisorDarkwa, James
dc.contributor.advisorMapolie, Selwyn. F
dc.contributor.authorMohlala, Matshwenyego. Sarah
dc.date.accessioned2023-06-19T08:45:20Z
dc.date.accessioned2024-05-09T10:51:27Z
dc.date.available2023-06-19T08:45:20Z
dc.date.available2024-05-09T10:51:27Z
dc.date.issued2003
dc.descriptionDoctor Educationisen_US
dc.description.abstractThe pyrazolyl ligands 2,6-bis(3,5-r2p*azolylcarbonyl)pyridine {r : 'bu (l1), me (l2)),2,6-bis(3-methylpyrazolylcarbonyl)pyridine(l3)'2'6- bis(pyrazolylcarbonyl)pyridine (l4) and 2,5-bis(3,5-rzpyrazolylcarbonyl)thiophene { r :,bu (l5), me (l6) were prepared by the reaction of 2,6-pyridinedicarbonyl dichloride and 2,5-thiophenedicarbonyl dichloride with the appropriate pymzoles and were characterizedby,h,',c1'h}nmr,irspectroscopyandelementalanalysis.reactions of the ligands l1-l3, l4 and l5 and pdclzuecn)z in a ratio of 1:1 yielded mononuclear and binuclear complexes [2,6-bis(3,5-rzpyrazolyl-1. carbonyl)pyridinelpalladiumod dichloride tr : 'bu (1), me (2))' [2'6-bis(3- methylpyrazolyl-1-carbonyl)pyridinelpalladium@) dichloride (3) and di-p-chlorodichlorobis[ 2,5-bis(rzpyrazolyl 1+arbonyl)thiophene]dipalladium(tr) {r : tbu (4)' r : me (5)). complex i was characterized by th' "c1th) nmr' ir spectroscopy and elemental analysis while complexes 2-5, which were insoluble in most common organic solvents, were charac teizedby elemental analysis and ir spectroscopy' the structures of the ligands l3,l6and complex 1, deduced ft'om spectroscopic studies' were confirmed by single crystal x-ray diftaction analysis'en_US
dc.identifier.urihttps://hdl.handle.net/10566/14604
dc.language.isoenen_US
dc.publisherUniversity of the Western Capeen_US
dc.rights.holderUniversity of the Western Capeen_US
dc.subjectPyrazolyl ligandsen_US
dc.subjectPyridinedicarbonyl dichlorideen_US
dc.subjectLigandsen_US
dc.subjectElemental analysisen_US
dc.subjectCatalytic activityen_US
dc.titlePyrazolyl palladium complexes with heterocyclic carbonyl linkers as catalyst precursors for ethylene and phenylacetylene polymerization.en_US

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