A study of secondary bonding effects in Werner clathrates

Simple item page
dc.contributor.advisorNassimbeni, Luigi Ren_ZA
dc.contributor.advisorNiven, Margaret Lilianen_ZA
dc.contributor.authorSuckling, Adrian Philipen_ZA
dc.date.accessioned2016-09-25T16:52:25Z
dc.date.available2016-09-25T16:52:25Z
dc.date.issued1988en_ZA
dc.description.abstractThe crystal structures of Ni(NCS)₂(4-ViPy)₂.nG where nG = 2CH₂Cl₂ (I), 2CCl₄ (II), 1.8CH₂I₂ (III) and CHI₃ (IV), as well as the crystal structure of [Ni(NCS)₂(4-ViPy)₄]. [Ni(NCS)₂(4-ViPy)₃(thf)].2CHI₃ (V) have been elucidated. The diiodomethane guest molecules in STRUCTURE III were severely disordered at room temperature and so this structure was solved at -40°C. The dichloromethane clathrate is isomorphous with the chloroform clathrate of the same host, and both these clathrates have a similar packing to the carbon tetrachloride clathrate. There is significant secondary bonding between the sulphur (donor) of the isothiocyanate ligand of the host and the iodines (acceptor) of the halogenated guest molecules in compounds III, IV and V. The iodoform clathrates, compounds IV and V, also show strong similarities in their packings. Particular attention has been paid to the shape and size of the cavities in which the guest molecules find themselves, in order to gain a better understanding of the nature of these clathrates. This has also shed some light on the probable cause of the disordered diiodomethane molecules in STRUCTURE III. Packing densities and volume comparisons of the [Ni(NCS)₂(4-ViPy)₂] clathrates have been carried out. Solid - state U.V/visible spectroscopy was used to obtain information on the host conformation, and thermal analysis (thermogravimatry and differential thermal analysis) was used to obtain insight into the host - guest interactions of these clathrates.en_ZA
dc.identifier.apacitationSuckling, A. P. (1988). <i>A study of secondary bonding effects in Werner clathrates</i>. (Thesis). University of Cape Town ,Faculty of Science ,Department of Chemistry. Retrieved from http://hdl.handle.net/11427/21939en_ZA
dc.identifier.chicagocitationSuckling, Adrian Philip. <i>"A study of secondary bonding effects in Werner clathrates."</i> Thesis., University of Cape Town ,Faculty of Science ,Department of Chemistry, 1988. http://hdl.handle.net/11427/21939en_ZA
dc.identifier.citationSuckling, A. 1988. A study of secondary bonding effects in Werner clathrates. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Suckling, Adrian Philip AB - The crystal structures of Ni(NCS)₂(4-ViPy)₂.nG where nG = 2CH₂Cl₂ (I), 2CCl₄ (II), 1.8CH₂I₂ (III) and CHI₃ (IV), as well as the crystal structure of [Ni(NCS)₂(4-ViPy)₄]. [Ni(NCS)₂(4-ViPy)₃(thf)].2CHI₃ (V) have been elucidated. The diiodomethane guest molecules in STRUCTURE III were severely disordered at room temperature and so this structure was solved at -40°C. The dichloromethane clathrate is isomorphous with the chloroform clathrate of the same host, and both these clathrates have a similar packing to the carbon tetrachloride clathrate. There is significant secondary bonding between the sulphur (donor) of the isothiocyanate ligand of the host and the iodines (acceptor) of the halogenated guest molecules in compounds III, IV and V. The iodoform clathrates, compounds IV and V, also show strong similarities in their packings. Particular attention has been paid to the shape and size of the cavities in which the guest molecules find themselves, in order to gain a better understanding of the nature of these clathrates. This has also shed some light on the probable cause of the disordered diiodomethane molecules in STRUCTURE III. Packing densities and volume comparisons of the [Ni(NCS)₂(4-ViPy)₂] clathrates have been carried out. Solid - state U.V/visible spectroscopy was used to obtain information on the host conformation, and thermal analysis (thermogravimatry and differential thermal analysis) was used to obtain insight into the host - guest interactions of these clathrates. DA - 1988 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1988 T1 - A study of secondary bonding effects in Werner clathrates TI - A study of secondary bonding effects in Werner clathrates UR - http://hdl.handle.net/11427/21939 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/21939
dc.identifier.vancouvercitationSuckling AP. A study of secondary bonding effects in Werner clathrates. [Thesis]. University of Cape Town ,Faculty of Science ,Department of Chemistry, 1988 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/21939en_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.otherClathrate compoundsen_ZA
dc.subject.otherPhysical Chemistryen_ZA
dc.titleA study of secondary bonding effects in Werner clathratesen_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
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
thesis_sci_1988_suckling_adrian_philip.pdf
Size:
1.86 MB
Format:
Adobe Portable Document Format
Description:
Download
Collections
Masters