Structure and reactivity of selected inclusion compounds

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dc.contributor.advisorNassimbeni, Luigi Ren_ZA
dc.contributor.advisorCaira, Mino Ren_ZA
dc.contributor.authorCoetzee, Anitaen_ZA
dc.date.accessioned2016-03-21T19:24:52Z
dc.date.available2016-03-21T19:24:52Z
dc.date.issued1996en_ZA
dc.descriptionIncludes bibliographical references.en_ZA
dc.description.abstractSelected inclusion compounds of hydroxy hosts from three different classes were investigated. The host compounds in class A are 2,7-substituted 2,2'-bis(9-hydroxy-9-fluorenyl)biphenyls, with the substituents being Cl, Br or tert-butyl. They readily form inclusion compounds with a wide variety of solvents. Their inclusion compounds with 1 ,4-dioxane, 1 ,3-dioxane, 1 ,3-dioxolane and acetone were investigated. The crystal structure of an unsolvated, α-phase, of the host compound 2,2'-bis(2,7-dichloro-9-hydroxy-9-fluorenyl)biphenyl was elucidated. The host compounds in class B are modified dihydroanthracenes. The inclusion compounds of trans-9, 1 0-dihydroxy-9, 1 0-diphenyl-9, 1 0-dihydroanthracene with 1,3-dioxolane, trans-9, 1 0-dihydroxy-9, 1 0-di-a-naphtyl-9, 1 0-dihydroanthracene with 1 ,3-dioxolane and with benzene, as well as trans-9, 1 0-dihydroxy-9, 1 0-di-p-tertbutylphenyl-9,10-dihydroanthracene with methanol and with benzene, were studied. The host in class C, 2,2'-bis(diphenylhydroxymethyl)-1, 1 '-biphenyl (H), is similar to the host compounds in class A, but is rendered conformationally more flexible. It forms two structurally similar inclusion compounds, H·H₂0·1/6 C₆H₆ and H-21/₆H2₂.The crystal structure of a p-xylene inclusion compound was also elucidated. The crystal structures of all these inclusion compounds were elucidated. All the compounds were characterised using thermal analysis and X-ray powder diffraction. The kinetics of desolvation of all the inclusion compounds in class A and B were studied, using isothermal or programmed temperature thermogravimetry. Attempts were made to describe the kinetic behaviour in terms of the crystal structures of these compounds. The Arrhenius parameters for the desolvation of all the inclusion compounds under investigation were found to show the compensation effect. The kinetics of solvation of trans-9, 1 0-dihydroxy-9, 1 0-diphenyl-9, 1 0-dihydroanthraceneand 1, 3-dioxolane was studied, using a quartz microbalance designed especially forth is purpose.en_ZA
dc.identifier.apacitationCoetzee, A. (1996). <i>Structure and reactivity of selected inclusion compounds</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/18110en_ZA
dc.identifier.chicagocitationCoetzee, Anita. <i>"Structure and reactivity of selected inclusion compounds."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1996. http://hdl.handle.net/11427/18110en_ZA
dc.identifier.citationCoetzee, A. 1996. Structure and reactivity of selected inclusion compounds. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Coetzee, Anita AB - Selected inclusion compounds of hydroxy hosts from three different classes were investigated. The host compounds in class A are 2,7-substituted 2,2'-bis(9-hydroxy-9-fluorenyl)biphenyls, with the substituents being Cl, Br or tert-butyl. They readily form inclusion compounds with a wide variety of solvents. Their inclusion compounds with 1 ,4-dioxane, 1 ,3-dioxane, 1 ,3-dioxolane and acetone were investigated. The crystal structure of an unsolvated, α-phase, of the host compound 2,2'-bis(2,7-dichloro-9-hydroxy-9-fluorenyl)biphenyl was elucidated. The host compounds in class B are modified dihydroanthracenes. The inclusion compounds of trans-9, 1 0-dihydroxy-9, 1 0-diphenyl-9, 1 0-dihydroanthracene with 1,3-dioxolane, trans-9, 1 0-dihydroxy-9, 1 0-di-a-naphtyl-9, 1 0-dihydroanthracene with 1 ,3-dioxolane and with benzene, as well as trans-9, 1 0-dihydroxy-9, 1 0-di-p-tertbutylphenyl-9,10-dihydroanthracene with methanol and with benzene, were studied. The host in class C, 2,2'-bis(diphenylhydroxymethyl)-1, 1 '-biphenyl (H), is similar to the host compounds in class A, but is rendered conformationally more flexible. It forms two structurally similar inclusion compounds, H·H₂0·1/6 C₆H₆ and H-21/₆H2₂.The crystal structure of a p-xylene inclusion compound was also elucidated. The crystal structures of all these inclusion compounds were elucidated. All the compounds were characterised using thermal analysis and X-ray powder diffraction. The kinetics of desolvation of all the inclusion compounds in class A and B were studied, using isothermal or programmed temperature thermogravimetry. Attempts were made to describe the kinetic behaviour in terms of the crystal structures of these compounds. The Arrhenius parameters for the desolvation of all the inclusion compounds under investigation were found to show the compensation effect. The kinetics of solvation of trans-9, 1 0-dihydroxy-9, 1 0-diphenyl-9, 1 0-dihydroanthraceneand 1, 3-dioxolane was studied, using a quartz microbalance designed especially forth is purpose. DA - 1996 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1996 T1 - Structure and reactivity of selected inclusion compounds TI - Structure and reactivity of selected inclusion compounds UR - http://hdl.handle.net/11427/18110 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18110
dc.identifier.vancouvercitationCoetzee A. Structure and reactivity of selected inclusion compounds. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1996 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18110en_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.titleStructure and reactivity of selected inclusion compoundsen_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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