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The crystal structure and constitution of some molecular complexes of 4:4- dinitrodiphenyl
The crystal structures or a number of molecular complexes formed by 4:4'-dinitrodiphenyl with various diphenyl derivatives are described. The general type of structure is undoubtedly the same for all the complexes examined and the typical arrangement may be taken as that in the complex of 4:4'-dinit...
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| Format: | Thesis |
| Language: | English English |
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Department of Physics
2017
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| _version_ | 1867613315525509120 |
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| access_status_str | Open Access |
| author | Saunder, Douglas Harold Saunder, Douglas Harold |
| author2 | James, R W |
| author_browse | James, R W Saunder, Douglas Harold |
| author_facet | James, R W Saunder, Douglas Harold Saunder, Douglas Harold |
| author_sort | Saunder, Douglas Harold |
| collection | Thesis |
| description | The crystal structures or a number of molecular complexes formed by 4:4'-dinitrodiphenyl with various diphenyl derivatives are described. The general type of structure is undoubtedly the same for all the complexes examined and the typical arrangement may be taken as that in the complex of 4:4'-dinitrodiphenyl with 4-hydroxydiphenyl, the structure of which has been fully determined. As shown in fig. 7 the dinitrodiphenyl molecules form layers in face-centred array and lie one above the other with a spacing of about 3.7 A. The arrangement of these molecules alone is such that a set of tubular cavities, also in face-centred array, run through the structure. In the complexes these cavities are occupied by the other component molecules, the hydroxydiphenyl molecules in the case considered; which thus lie nearly normal to the planes containing the dinitrodiphenyl molecules and are seen end-on in fig. 7. In the other structures examined geometrical and symmetry conditions require that the individual molecules should be tilted in varying degrees, but the type or structure still remains essentially the same. It is shown that the ratio of the components in these complexes is determined by the length of the molecule other than dinitrodiphenyl, and that in no case is it necessary for the intermolecular distances to be shorter than those found in crystals or ordinary aromatic nitro-compounds. A bonding mechanism in terms of dipole attraction between the component molecules is shown to be consistent with all the observed data. Of interest are the periodic distortions which appear to occur in the crystal lattices of the complexes or 4:4'-dinitrodiphenyl with 4-iodo-, 4-bromo- and 4-chlorodiphenyl. |
| format | Thesis |
| id | oai:open.uct.ac.za:11427/23546 |
| institution | University of Cape Town (South Africa) |
| language | eng eng |
| last_indexed | 2026-06-10T12:34:10.861Z |
| license_str | Not specified — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UCTD — University of Cape Town Open Access Repository |
| publishDate | 2017 |
| publishDateRange | 2017 |
| publishDateSort | 2017 |
| publisher | Department of Physics |
| publisherStr | Department of Physics |
| record_format | dspace |
| source_str | UCTD — University of Cape Town Open Access Repository |
| spelling | oai:open.uct.ac.za:11427/23546 The crystal structure and constitution of some molecular complexes of 4:4- dinitrodiphenyl The crystal structure and constitution of some molecular complexes of 4:4'- Dinitrodiphenyl Saunder, Douglas Harold Saunder, Douglas Harold James, R W Rapson, W S Chemistry Crystallography The crystal structures or a number of molecular complexes formed by 4:4'-dinitrodiphenyl with various diphenyl derivatives are described. The general type of structure is undoubtedly the same for all the complexes examined and the typical arrangement may be taken as that in the complex of 4:4'-dinitrodiphenyl with 4-hydroxydiphenyl, the structure of which has been fully determined. As shown in fig. 7 the dinitrodiphenyl molecules form layers in face-centred array and lie one above the other with a spacing of about 3.7 A. The arrangement of these molecules alone is such that a set of tubular cavities, also in face-centred array, run through the structure. In the complexes these cavities are occupied by the other component molecules, the hydroxydiphenyl molecules in the case considered; which thus lie nearly normal to the planes containing the dinitrodiphenyl molecules and are seen end-on in fig. 7. In the other structures examined geometrical and symmetry conditions require that the individual molecules should be tilted in varying degrees, but the type or structure still remains essentially the same. It is shown that the ratio of the components in these complexes is determined by the length of the molecule other than dinitrodiphenyl, and that in no case is it necessary for the intermolecular distances to be shorter than those found in crystals or ordinary aromatic nitro-compounds. A bonding mechanism in terms of dipole attraction between the component molecules is shown to be consistent with all the observed data. Of interest are the periodic distortions which appear to occur in the crystal lattices of the complexes or 4:4'-dinitrodiphenyl with 4-iodo-, 4-bromo- and 4-chlorodiphenyl. 2017-01-27T07:31:48Z 2017-01-27T07:31:48Z 1947 2016-11-22T11:49:41Z Doctoral Thesis Doctoral PhD http://hdl.handle.net/11427/23546 eng eng application/pdf Department of Physics Faculty of Science University of Cape Town |
| spellingShingle | Chemistry Crystallography Saunder, Douglas Harold Saunder, Douglas Harold The crystal structure and constitution of some molecular complexes of 4:4- dinitrodiphenyl |
| thesis_degree_str | Doctoral |
| title | The crystal structure and constitution of some molecular complexes of 4:4- dinitrodiphenyl |
| title_full | The crystal structure and constitution of some molecular complexes of 4:4- dinitrodiphenyl |
| title_fullStr | The crystal structure and constitution of some molecular complexes of 4:4- dinitrodiphenyl |
| title_full_unstemmed | The crystal structure and constitution of some molecular complexes of 4:4- dinitrodiphenyl |
| title_short | The crystal structure and constitution of some molecular complexes of 4:4- dinitrodiphenyl |
| title_sort | crystal structure and constitution of some molecular complexes of 4 4 dinitrodiphenyl |
| topic | Chemistry Crystallography |
| url | http://hdl.handle.net/11427/23546 |
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