{"id":{"repo_id":"wurz-thes","oai_identifier":"oai:opus.bibliothek.uni-wuerzburg.de:226"},"canonical_url":"https://search.dev.ndltd.org/etd/wurz-thes/oai:opus.bibliothek.uni-wuerzburg.de:226","repository":{"repo_id":"wurz-thes","name":"Universität Wüzburg","base_url":"https://opus.bibliothek.uni-wuerzburg.de/oai"},"display":{"title":"Novel dianionic sulfur ylides and related compounds","abstract":"Priority task of the thesis was to replace oxygen atoms in sulfur oxoanions SOnm– or imido groups in sulfur polyimido anions S(NR)nm– isoelectronically by R2C-methylene groups. This would open a wide avenue to new target molecules containing a formally double bonded carbon next to formally double bonded nitrogen atoms in highly charged sulfur-centred anions like S(CR2)x(NR)ym–. They clearly are reminiscent to sulfur ylides. Both, alkylendiimidosulfites and alkylentriimidosulfates are accessible via deprotonaton of the corresponding alkyldiimidosulfinates and alkyltriimidosulfonates with methyllithium. The reactivity of the novel compounds is dominated by the carbanionic centre. Addition reactions to another SN formal doubble bond are feasible and are leading to the yet unknown imidoanalogues compounds alkyl-bis-(diimidosulfinates) and alkyl-bis-(triimidosulfonates).","abstract_html":"Priority task of the thesis was to replace oxygen atoms in sulfur oxoanions SOnm– or imido groups in sulfur polyimido anions S(NR)nm– isoelectronically by R2C-methylene groups. This would open a wide avenue to new target molecules containing a formally double bonded carbon next to formally double bonded nitrogen atoms in highly charged sulfur-centred anions like S(CR2)x(NR)ym–. They clearly are reminiscent to sulfur ylides. Both, alkylendiimidosulfites and alkylentriimidosulfates are accessible via deprotonaton of the corresponding alkyldiimidosulfinates and alkyltriimidosulfonates with methyllithium. The reactivity of the novel compounds is dominated by the carbanionic centre. Addition reactions to another SN formal doubble bond are feasible and are leading to the yet unknown imidoanalogues compounds alkyl-bis-(diimidosulfinates) and alkyl-bis-(triimidosulfonates).","abstract_has_math":false,"creators":["Walfort, Bernhard"],"institution":"Universität Würzburg","degree_name":null,"degree_level":"thesis.doctoral","degree_discipline":null,"degree_department":null,"school":null,"contributors":["Stalke, Dietmer"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2002,"date_issued":"2002-01-25","date_published":"2002-01-25","updated_at":"2026-07-24T06:11:05Z","subjects":["Schwefelylide","Polyimidoanionen","Sulfit","Sulfat","Sulfur Ylides","Polyimido Anions","Sulfite","Sulfate"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://opus.bibliothek.uni-wuerzburg.de/frontdoor/index/index/docId/226","outbound_label":"Repository record","outbound_source":"source_url"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Stalke, Dietmer"]},{"key":"dc:creator","label":"Author","values":["Walfort, Bernhard"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:publisher","label":"Institution","values":["Universität Würzburg"]},{"key":"dc:type","label":"Dc Type","values":["doctoralThesis"]},{"key":"thesis:degree_level","label":"Degree Level","values":["thesis.doctoral"]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["Universität Würzburg"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Schwefelylide","Polyimidoanionen","Sulfit","Sulfat","Sulfur Ylides","Polyimido Anions","Sulfite","Sulfate"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Priority task of the thesis was to replace oxygen atoms in sulfur oxoanions SOnm– or imido groups in sulfur polyimido anions S(NR)nm– isoelectronically by R2C-methylene groups. This would open a wide avenue to new target molecules containing a formally double bonded carbon next to formally double bonded nitrogen atoms in highly charged sulfur-centred anions like S(CR2)x(NR)ym–. They clearly are reminiscent to sulfur ylides. Both, alkylendiimidosulfites and alkylentriimidosulfates are accessible via deprotonaton of the corresponding alkyldiimidosulfinates and alkyltriimidosulfonates with methyllithium. The reactivity of the novel compounds is dominated by the carbanionic centre. Addition reactions to another SN formal doubble bond are feasible and are leading to the yet unknown imidoanalogues compounds alkyl-bis-(diimidosulfinates) and alkyl-bis-(triimidosulfonates).","Der Schwerpunkt der Arbeit lag in dem isoelektronischen Ersatz der Sauerstoffatome in Schwefeloxoanionen SOnm- oder der Imidogruppen in Schwefelpolyimidoanionen durch eine R2C-methylen Gruppe. Diese Moleküle besitzen neben einer formalen SC-Doppelbindung eine SN-Doppelbindung mit einem stark positiv geladenem Schwefelatom als Zentrum S(CR2)x(NR)ym–. Diese Verbindungen enthalten analog der bekannten Sulfonium- und Sulfoxoniumylide einen positiv geladenen Schwefel nebst einem negativ geladenen Kohlenstoff. Sowohl die Alkylendiimidosulfite als auch die Alkylentriimidosulfate sind mittels Deprotonierung des alpha-Kohlenstoffatoms in Alkyldiimidosulfinaten und Alkyltriimidosulfonaten mit Methyllithium erhältlich. Die Reaktivität dieser neuartigen Verbindungen wird durch das carbanionische Kohlenstoffatom bestimmt. Additionsreaktionen dieser verbindungen an eine formale SN-Doppelbindung sind möglich und führen zu den bis dahin unbekannten Imidoanalogen Verbindungen, Alkyl-bis-(diimidosulfinat) und Alkyl-bis-(triimidosulfonat)."]},{"key":"dc:format.medium","label":"Dc Format Medium","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Novel dianionic sulfur ylides and related compounds","Neuartige dianionische Schwefelylide und verwandte Verbindungen"]}]}],"canonical_facts":{"dc:contributor":["Stalke, Dietmer"],"dc:creator":["Walfort, Bernhard"],"dc:description.abstract":["Priority task of the thesis was to replace oxygen atoms in sulfur oxoanions SOnm– or imido groups in sulfur polyimido anions S(NR)nm– isoelectronically by R2C-methylene groups. This would open a wide avenue to new target molecules containing a formally double bonded carbon next to formally double bonded nitrogen atoms in highly charged sulfur-centred anions like S(CR2)x(NR)ym–. They clearly are reminiscent to sulfur ylides. Both, alkylendiimidosulfites and alkylentriimidosulfates are accessible via deprotonaton of the corresponding alkyldiimidosulfinates and alkyltriimidosulfonates with methyllithium. The reactivity of the novel compounds is dominated by the carbanionic centre. Addition reactions to another SN formal doubble bond are feasible and are leading to the yet unknown imidoanalogues compounds alkyl-bis-(diimidosulfinates) and alkyl-bis-(triimidosulfonates).","Der Schwerpunkt der Arbeit lag in dem isoelektronischen Ersatz der Sauerstoffatome in Schwefeloxoanionen SOnm- oder der Imidogruppen in Schwefelpolyimidoanionen durch eine R2C-methylen Gruppe. Diese Moleküle besitzen neben einer formalen SC-Doppelbindung eine SN-Doppelbindung mit einem stark positiv geladenem Schwefelatom als Zentrum S(CR2)x(NR)ym–. Diese Verbindungen enthalten analog der bekannten Sulfonium- und Sulfoxoniumylide einen positiv geladenen Schwefel nebst einem negativ geladenen Kohlenstoff. Sowohl die Alkylendiimidosulfite als auch die Alkylentriimidosulfate sind mittels Deprotonierung des alpha-Kohlenstoffatoms in Alkyldiimidosulfinaten und Alkyltriimidosulfonaten mit Methyllithium erhältlich. Die Reaktivität dieser neuartigen Verbindungen wird durch das carbanionische Kohlenstoffatom bestimmt. Additionsreaktionen dieser verbindungen an eine formale SN-Doppelbindung sind möglich und führen zu den bis dahin unbekannten Imidoanalogen Verbindungen, Alkyl-bis-(diimidosulfinat) und Alkyl-bis-(triimidosulfonat)."],"dc:format.medium":["application/pdf"],"dc:publisher":["Universität Würzburg"],"dc:subject":["Schwefelylide","Polyimidoanionen","Sulfit","Sulfat","Sulfur Ylides","Polyimido Anions","Sulfite","Sulfate"],"dc:title":["Novel dianionic sulfur ylides and related compounds","Neuartige dianionische Schwefelylide und verwandte Verbindungen"],"dc:type":["doctoralThesis"],"thesis:degree_level":["thesis.doctoral"],"thesis:institution_name":["Universität Würzburg"]},"updated_at":"2026-07-24T06:11:05Z"}