Separation of close isomers by enclathration

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dc.contributor.advisorNassimbeni, Luigi Ren_ZA
dc.contributor.authorHorne, Aliciaen_ZA
dc.date.accessioned2016-05-13T09:35:23Z
dc.date.available2016-05-13T09:35:23Z
dc.date.issued1997en_ZA
dc.description.abstractThe selective inclusion properties of the host compound 1, 1-bis-( 4- hydroxyphenyl)cyclohexane were investigated. This host readily forms inclusion compounds with the isomers of phenylenediamine, benzenediol, picoline and lutidine, as well as selected solvents including methanol, ethanol, i-propanol, n-butanol, ethyl acetate and dioxane. The crystal structures of the complexes formed were elucidated, and comparisons were made between the packing of the complexes, and the intermolecular interactions between the host and guest components of the complexes. The complexes were characterised using thermal analysis and X-ray powder diffraction. The lattice energies of the complexes were calculated to determine their relative stability. The kinetics of desolvation of the picoline and lutidine inclusion compounds were studied, using isothermal and non-isothermal thermogravimetry. These experiments yielded the kinetic models as well as the activation energies of the desolvation reactions. Competition experiments were performed to determine which isomers of the compounds mentioned above were enclathrated preferentially by the host, and the observed selectivity was related to differences in complementary between the host and guest components in each complex. Inclusion compounds were formed between the host and the solid guests (benzenediol and phenylenediamine) by means of solid-solid reactions. The complexes were formed by grinding the two powdered starting components together in a ball mill. The resulting products were analysed by X-ray powder diffractometry. Competition experiments were also performed in the solid state to determine whether the selectivity of the host differed from that observed in solution.en_ZA
dc.identifier.apacitationHorne, A. (1997). <i>Separation of close isomers by enclathration</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/19647en_ZA
dc.identifier.chicagocitationHorne, Alicia. <i>"Separation of close isomers by enclathration."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1997. http://hdl.handle.net/11427/19647en_ZA
dc.identifier.citationHorne, A. 1997. Separation of close isomers by enclathration. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Horne, Alicia AB - The selective inclusion properties of the host compound 1, 1-bis-( 4- hydroxyphenyl)cyclohexane were investigated. This host readily forms inclusion compounds with the isomers of phenylenediamine, benzenediol, picoline and lutidine, as well as selected solvents including methanol, ethanol, i-propanol, n-butanol, ethyl acetate and dioxane. The crystal structures of the complexes formed were elucidated, and comparisons were made between the packing of the complexes, and the intermolecular interactions between the host and guest components of the complexes. The complexes were characterised using thermal analysis and X-ray powder diffraction. The lattice energies of the complexes were calculated to determine their relative stability. The kinetics of desolvation of the picoline and lutidine inclusion compounds were studied, using isothermal and non-isothermal thermogravimetry. These experiments yielded the kinetic models as well as the activation energies of the desolvation reactions. Competition experiments were performed to determine which isomers of the compounds mentioned above were enclathrated preferentially by the host, and the observed selectivity was related to differences in complementary between the host and guest components in each complex. Inclusion compounds were formed between the host and the solid guests (benzenediol and phenylenediamine) by means of solid-solid reactions. The complexes were formed by grinding the two powdered starting components together in a ball mill. The resulting products were analysed by X-ray powder diffractometry. Competition experiments were also performed in the solid state to determine whether the selectivity of the host differed from that observed in solution. DA - 1997 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1997 T1 - Separation of close isomers by enclathration TI - Separation of close isomers by enclathration UR - http://hdl.handle.net/11427/19647 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/19647
dc.identifier.vancouvercitationHorne A. Separation of close isomers by enclathration. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1997 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/19647en_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.titleSeparation of close isomers by enclathrationen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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