{"id":{"repo_id":"cape-town","oai_identifier":"oai:open.uct.ac.za:11427/17512"},"canonical_url":"https://search.dev.ndltd.org/etd/cape-town/oai:open.uct.ac.za:11427/17512","repository":{"repo_id":"cape-town","name":"University of Cape Town","base_url":"https://open.uct.ac.za/oai/request"},"display":{"title":"Synthesis, characterisation and coordination chemistry of novel N-alkyl- and N,N-dialkyl-N'-acylthioureas","abstract":"A series of N-alkyl- and N,N-dialkyl-N'-acylthioureas are synthesised and characterised. The crystal structure of N-butyl-N'-benzoylthiourea indicates that an intramolecular hydrogen bond locks the potentially bidentate chelate moiety into a planar six-membered ring with an overall rod-like molecular structure. The rod-like structure of the N-alkyl-N'-benzoylthioureas is exploited and the synthesis and characterisation of a novel series of liquid crystals based on N-(p-alkyl(oxy))aniline-N'-(p-alkyl(oxy))benzoylthiourea is discussed. The liquid-crystalline phases are identified with the aid of Polarising Optical Microscopy and confirmed by Differential Scanning Calorimetry studies. The compounds display nematic, smectic A or a combination of these liquid crystal phases. The X-ray crystal structure of N-(p-hexyloxy)aniline-N'-(pmethyloxy) benzoylthiourea shows co-planarity of the aromatic and hydrogen-bonded six-membered rings. Intennolecular hydrogen bond interactions between adjacent molecules allow for favourable molecular interaction for the formation of liquid crystal phases.","abstract_html":"A series of N-alkyl- and N,N-dialkyl-N'-acylthioureas are synthesised and characterised. The crystal structure of N-butyl-N'-benzoylthiourea indicates that an intramolecular hydrogen bond locks the potentially bidentate chelate moiety into a planar six-membered ring with an overall rod-like molecular structure. The rod-like structure of the N-alkyl-N'-benzoylthioureas is exploited and the synthesis and characterisation of a novel series of liquid crystals based on N-(p-alkyl(oxy))aniline-N'-(p-alkyl(oxy))benzoylthiourea is discussed. The liquid-crystalline phases are identified with the aid of Polarising Optical Microscopy and confirmed by Differential Scanning Calorimetry studies. The compounds display nematic, smectic A or a combination of these liquid crystal phases. The X-ray crystal structure of N-(p-hexyloxy)aniline-N'-(pmethyloxy) benzoylthiourea shows co-planarity of the aromatic and hydrogen-bonded six-membered rings. Intennolecular hydrogen bond interactions between adjacent molecules allow for favourable molecular interaction for the formation of liquid crystal phases.","abstract_has_math":false,"creators":["Grimmbacher, Tarron"],"institution":"Department of Chemistry","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":["Koch, Klaus R"],"committee_chairs":[],"committee_members":[],"year":1995,"date_issued":"1995","date_published":"1995","updated_at":"2026-07-22T22:23:33Z","subjects":[],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/11427/17512","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Koch, Klaus R"]},{"key":"dc:creator","label":"Author","values":["Grimmbacher, Tarron"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2016-03-04T16:52:46Z"]},{"key":"dc:date.available","label":"Dc Date Available","values":["2016-03-04T16:52:46Z"]},{"key":"dc:date.issued","label":"Date","values":["1995"]},{"key":"dc:publisher.department","label":"Dc Publisher Department","values":["Department of Chemistry"]},{"key":"dc:publisher.institution","label":"Dc Publisher Institution","values":["University of Cape Town"]},{"key":"dc:type","label":"Dc Type","values":["Doctoral Thesis"]},{"key":"dc:type.qualificationlevel","label":"Dc Type Qualificationlevel","values":["Doctoral"]},{"key":"dc:type.qualificationname","label":"Dc Type Qualificationname","values":["PhD"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["http://hdl.handle.net/11427/17512"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Includes bibliographical references."]},{"key":"dc:description.abstract","label":"Abstract","values":["A series of N-alkyl- and N,N-dialkyl-N'-acylthioureas are synthesised and characterised. The crystal structure of N-butyl-N'-benzoylthiourea indicates that an intramolecular hydrogen bond locks the potentially bidentate chelate moiety into a planar six-membered ring with an overall rod-like molecular structure. The rod-like structure of the N-alkyl-N'-benzoylthioureas is exploited and the synthesis and characterisation of a novel series of liquid crystals based on N-(p-alkyl(oxy))aniline-N'-(p-alkyl(oxy))benzoylthiourea is discussed. The liquid-crystalline phases are identified with the aid of Polarising Optical Microscopy and confirmed by Differential Scanning Calorimetry studies. The compounds display nematic, smectic A or a combination of these liquid crystal phases. The X-ray crystal structure of N-(p-hexyloxy)aniline-N'-(pmethyloxy) benzoylthiourea shows co-planarity of the aromatic and hydrogen-bonded six-membered rings. Intennolecular hydrogen bond interactions between adjacent molecules allow for favourable molecular interaction for the formation of liquid crystal phases."]},{"key":"dc:title","label":"Title","values":["Synthesis, characterisation and coordination chemistry of novel N-alkyl- and N,N-dialkyl-N'-acylthioureas"]}]}],"canonical_facts":{"dc:contributor.advisor":["Koch, Klaus R"],"dc:creator":["Grimmbacher, Tarron"],"dc:date.accessioned":["2016-03-04T16:52:46Z"],"dc:date.available":["2016-03-04T16:52:46Z"],"dc:date.issued":["1995"],"dc:description":["Includes bibliographical references."],"dc:description.abstract":["A series of N-alkyl- and N,N-dialkyl-N'-acylthioureas are synthesised and characterised. The crystal structure of N-butyl-N'-benzoylthiourea indicates that an intramolecular hydrogen bond locks the potentially bidentate chelate moiety into a planar six-membered ring with an overall rod-like molecular structure. The rod-like structure of the N-alkyl-N'-benzoylthioureas is exploited and the synthesis and characterisation of a novel series of liquid crystals based on N-(p-alkyl(oxy))aniline-N'-(p-alkyl(oxy))benzoylthiourea is discussed. The liquid-crystalline phases are identified with the aid of Polarising Optical Microscopy and confirmed by Differential Scanning Calorimetry studies. The compounds display nematic, smectic A or a combination of these liquid crystal phases. The X-ray crystal structure of N-(p-hexyloxy)aniline-N'-(pmethyloxy) benzoylthiourea shows co-planarity of the aromatic and hydrogen-bonded six-membered rings. Intennolecular hydrogen bond interactions between adjacent molecules allow for favourable molecular interaction for the formation of liquid crystal phases."],"dc:identifier.uri":["http://hdl.handle.net/11427/17512"],"dc:language.iso":["eng"],"dc:publisher.department":["Department of Chemistry"],"dc:publisher.institution":["University of Cape Town"],"dc:title":["Synthesis, characterisation and coordination chemistry of novel N-alkyl- and N,N-dialkyl-N'-acylthioureas"],"dc:type":["Doctoral Thesis"],"dc:type.qualificationlevel":["Doctoral"],"dc:type.qualificationname":["PhD"]},"updated_at":"2026-07-22T22:23:33Z"}