A structural investigation of the mercury-sulphur interaction

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dc.contributor.advisorNassimbeni, Luigi Ren_ZA
dc.contributor.authorDijkstra, Ellemiekeen_ZA
dc.date.accessioned2014-12-11T21:00:02Z
dc.date.available2014-12-11T21:00:02Z
dc.date.issued1982en_ZA
dc.descriptionBibliography: p. 130-136.en_ZA
dc.description.abstractThe crystal and molecular structures of phenyl, 2-mercaptopyrimidine mercury(II) and phenyl,mercaptobenzene mercury(II) have been determined by the methods of X-ray crystallography. The interaction between mercury and sulphur is investigated. This interaction is of interest both biochemically and toxicologically. More specifically, secondary Hg---S interactions are found to mimic that observed in NMR exchange processes, where they undergo a transition state as a four-membered bridging intermediate. Structural correlations between compounds containing at least one mercury - sulphur covalent bond are examined. The coordination geometry about the mercury atom is generally found to be distorted tetrahedra or octahedra, with a very strong tendency to retain the linear character of the R - Hg - S angle. The electronegativity of sulphur is found to be the most influential parameter in determining the coordination geonetry of the mercury atom. The transition from four- to six-coordinated structures is examined but did not reveal unambiguously whether this occurs by an SN3 or (SN2)2 disubstitution process. The four-membered bridging structure formed by secondary Hg---S interactions is investigated to determine whether minimum energy pathways are evident. However, there is no evidence for pathways representing exchange as observed in solution.en_ZA
dc.identifier.apacitationDijkstra, E. (1982). <i>A structural investigation of the mercury-sulphur interaction</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/9971en_ZA
dc.identifier.chicagocitationDijkstra, Ellemieke. <i>"A structural investigation of the mercury-sulphur interaction."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1982. http://hdl.handle.net/11427/9971en_ZA
dc.identifier.citationDijkstra, E. 1982. A structural investigation of the mercury-sulphur interaction. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Dijkstra, Ellemieke AB - The crystal and molecular structures of phenyl, 2-mercaptopyrimidine mercury(II) and phenyl,mercaptobenzene mercury(II) have been determined by the methods of X-ray crystallography. The interaction between mercury and sulphur is investigated. This interaction is of interest both biochemically and toxicologically. More specifically, secondary Hg---S interactions are found to mimic that observed in NMR exchange processes, where they undergo a transition state as a four-membered bridging intermediate. Structural correlations between compounds containing at least one mercury - sulphur covalent bond are examined. The coordination geometry about the mercury atom is generally found to be distorted tetrahedra or octahedra, with a very strong tendency to retain the linear character of the R - Hg - S angle. The electronegativity of sulphur is found to be the most influential parameter in determining the coordination geonetry of the mercury atom. The transition from four- to six-coordinated structures is examined but did not reveal unambiguously whether this occurs by an SN3 or (SN2)2 disubstitution process. The four-membered bridging structure formed by secondary Hg---S interactions is investigated to determine whether minimum energy pathways are evident. However, there is no evidence for pathways representing exchange as observed in solution. DA - 1982 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1982 T1 - A structural investigation of the mercury-sulphur interaction TI - A structural investigation of the mercury-sulphur interaction UR - http://hdl.handle.net/11427/9971 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/9971
dc.identifier.vancouvercitationDijkstra E. A structural investigation of the mercury-sulphur interaction. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1982 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/9971en_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.titleA structural investigation of the mercury-sulphur interactionen_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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