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Structure and reactivity of selected inclusion compounds
Includes bibliographical references.
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| Main Author: | |
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| Other Authors: | |
| Format: | Thesis |
| Language: | English |
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Department of Chemistry
2016
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| _version_ | 1867613184991428609 |
|---|---|
| access_status_str | Open Access |
| author | Coetzee, Anita |
| author2 | Nassimbeni, Luigi R |
| author_browse | Coetzee, Anita Nassimbeni, Luigi R |
| author_facet | Nassimbeni, Luigi R Coetzee, Anita |
| author_sort | Coetzee, Anita |
| collection | Thesis |
| description | Includes bibliographical references. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/18110 |
| institution | University of Cape Town (South Africa) |
| language | eng |
| last_indexed | 2026-06-10T12:32:07.214Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2016 |
| publishDateRange | 2016 |
| publishDateSort | 2016 |
| publisher | Department of Chemistry |
| publisherStr | Department of Chemistry |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/18110 Structure and reactivity of selected inclusion compounds Coetzee, Anita Nassimbeni, Luigi R Caira, Mino R Chemistry Includes bibliographical references. 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. 2016-03-21T19:24:52Z 2016-03-21T19:24:52Z 1996 Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/18110 eng application/pdf Department of Chemistry Faculty of Science University of Cape Town |
| spellingShingle | Chemistry Coetzee, Anita Structure and reactivity of selected inclusion compounds |
| thesis_degree_str | Doctoral |
| title | Structure and reactivity of selected inclusion compounds |
| title_full | Structure and reactivity of selected inclusion compounds |
| title_fullStr | Structure and reactivity of selected inclusion compounds |
| title_full_unstemmed | Structure and reactivity of selected inclusion compounds |
| title_short | Structure and reactivity of selected inclusion compounds |
| title_sort | structure and reactivity of selected inclusion compounds |
| topic | Chemistry |
| url | http://hdl.handle.net/11427/18110 |
| work_keys_str_mv | AT coetzeeanita structureandreactivityofselectedinclusioncompounds |