{"id":{"repo_id":"aachen","oai_identifier":"oai:publications.rwth-aachen.de:61919"},"canonical_url":"https://search.dev.ndltd.org/etd/aachen/oai:publications.rwth-aachen.de:61919","repository":{"repo_id":"aachen","name":"RWTH Aachen University","base_url":"https://publications.rwth-aachen.de/oai2d"},"display":{"title":"Synthese, Stereochemie und Eigenschaften einiger organischer Tellurate(VI)","abstract":"2 known and 15 new organic tellurates(VI) were synthesised starting from Te(OH)6. Their stereochemistries were investigated by spectroscopic methods (IR, UV, CD, MCD, NMR, MS) and by X-ray analysis. Orthotellurates Te(OAlk)6 Alk = Me, Et and the binuclear tellurate [(EtO)5Te]2O were made by alkylations with trialkylorthoformiates. Cyclic tellurates were synthesised by the reaction of Te(OH)6 with neat 1,2-diols, by the reaction of diols or triols with the reaction mixture of the alkylation of Te(OH)6 with trialkylorthoformiates or by the transesterification of the tartaric ester function of {[(R)-MeOOCCHO]2}3Te with alcohols (EtOH, i-PrOH, n-BuOH). (Mononuclear) orthotellurates were synthesised from ethanediol; rac- and S-1,2-propanediol; meso-, rac- and (R,R)-2,3-butanediol; [(R)-AlkOOCCHOH]2 Alk = Me, Et, i-Pr; AlkC(CH2OH)3 Alk = Me, Et. Binuclear tellurates of the type (L2Te)2O2 were synthesised from LH2 = ethanediol; meso-, rac- and (R,R)-2,3-butanediol; 2,3-dimethyl-2,3-butanediol. X-ray analysis in the solid state exhibit a distorted TeO6-octahedron with (R,R)-dimethyltartrate as a diolato ligand for {[(R)-MeOOCCHO]2}3Te, an almost perfect TeO6-octahedron for [EtC(CH2O)3]2Te, 2 distorted TeO6-octahedra which are connected by edge-sharing oxygen atoms for the binuclear tellurate from rac-2,3-butanediol. The racemisations and epimerisations at the octahedral centers of 7 organic tellurates were investigated by polarimetry and NMR spectroscopy. Half-lives at room temperature of ca. 1 s up to several hours were found. By the reaction of Te(OH)6 with (R,R)-tartaric acid and DMSO, a product with the composition Te2O14C8H4 4 DMSO was isolated.","abstract_html":"2 known and 15 new organic tellurates(VI) were synthesised starting from Te(OH)6. Their stereochemistries were investigated by spectroscopic methods (IR, UV, CD, MCD, NMR, MS) and by X-ray analysis. Orthotellurates Te(OAlk)6 Alk = Me, Et and the binuclear tellurate [(EtO)5Te]2O were made by alkylations with trialkylorthoformiates. Cyclic tellurates were synthesised by the reaction of Te(OH)6 with neat 1,2-diols, by the reaction of diols or triols with the reaction mixture of the alkylation of Te(OH)6 with trialkylorthoformiates or by the transesterification of the tartaric ester function of {[(R)-MeOOCCHO]2}3Te with alcohols (EtOH, i-PrOH, n-BuOH). (Mononuclear) orthotellurates were synthesised from ethanediol; rac- and S-1,2-propanediol; meso-, rac- and (R,R)-2,3-butanediol; [(R)-AlkOOCCHOH]2 Alk = Me, Et, i-Pr; AlkC(CH2OH)3 Alk = Me, Et. Binuclear tellurates of the type (L2Te)2O2 were synthesised from LH2 = ethanediol; meso-, rac- and (R,R)-2,3-butanediol; 2,3-dimethyl-2,3-butanediol. X-ray analysis in the solid state exhibit a distorted TeO6-octahedron with (R,R)-dimethyltartrate as a diolato ligand for {[(R)-MeOOCCHO]2}3Te, an almost perfect TeO6-octahedron for [EtC(CH2O)3]2Te, 2 distorted TeO6-octahedra which are connected by edge-sharing oxygen atoms for the binuclear tellurate from rac-2,3-butanediol. The racemisations and epimerisations at the octahedral centers of 7 organic tellurates were investigated by polarimetry and NMR spectroscopy. Half-lives at room temperature of ca. 1 s up to several hours were found. By the reaction of Te(OH)6 with (R,R)-tartaric acid and DMSO, a product with the composition Te2O14C8H4 4 DMSO was isolated.","abstract_has_math":false,"creators":["Bausch, Stephan"],"institution":"Publikationsserver der RWTH Aachen University","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Laur, Peter"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2001,"date_issued":"2001","date_published":"2001","updated_at":"2026-07-30T19:43:19Z","subjects":["info:eu-repo/classification/ddc/540","Chemie","Tellurorganische Verbindungen","Tellurate"],"languages":["ger"],"rights":["info:eu-repo/semantics/openAccess"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123531%22"],"render_values":[{"text":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123531%22","href":"https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123531%22","code":true}]}]},"links":{"outbound_url":"https://publications.rwth-aachen.de/record/61919","outbound_label":"Repository record","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Laur, Peter"]},{"key":"dc:creator","label":"Author","values":["Bausch, Stephan"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:coverage","label":"Dc Coverage","values":["DE"]},{"key":"dc:date","label":"Dc Date","values":["2001"]},{"key":"dc:publisher","label":"Institution","values":["Publikationsserver der RWTH Aachen University"]},{"key":"dc:relation","label":"Dc Relation","values":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-1436"]},{"key":"dc:type","label":"Dc Type","values":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["info:eu-repo/classification/ddc/540","Chemie","Tellurorganische Verbindungen","Tellurate"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["ger"]},{"key":"dc:rights","label":"Dc Rights","values":["info:eu-repo/semantics/openAccess"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://publications.rwth-aachen.de/record/61919","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123531%22"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["2 known and 15 new organic tellurates(VI) were synthesised starting from Te(OH)6. Their stereochemistries were investigated by spectroscopic methods (IR, UV, CD, MCD, NMR, MS) and by X-ray analysis. Orthotellurates Te(OAlk)6 Alk = Me, Et and the binuclear tellurate [(EtO)5Te]2O were made by alkylations with trialkylorthoformiates. Cyclic tellurates were synthesised by the reaction of Te(OH)6 with neat 1,2-diols, by the reaction of diols or triols with the reaction mixture of the alkylation of Te(OH)6 with trialkylorthoformiates or by the transesterification of the tartaric ester function of {[(R)-MeOOCCHO]2}3Te with alcohols (EtOH, i-PrOH, n-BuOH). (Mononuclear) orthotellurates were synthesised from ethanediol; rac- and S-1,2-propanediol; meso-, rac- and (R,R)-2,3-butanediol; [(R)-AlkOOCCHOH]2 Alk = Me, Et, i-Pr; AlkC(CH2OH)3 Alk = Me, Et. Binuclear tellurates of the type (L2Te)2O2 were synthesised from LH2 = ethanediol; meso-, rac- and (R,R)-2,3-butanediol; 2,3-dimethyl-2,3-butanediol. X-ray analysis in the solid state exhibit a distorted TeO6-octahedron with (R,R)-dimethyltartrate as a diolato ligand for {[(R)-MeOOCCHO]2}3Te, an almost perfect TeO6-octahedron for [EtC(CH2O)3]2Te, 2 distorted TeO6-octahedra which are connected by edge-sharing oxygen atoms for the binuclear tellurate from rac-2,3-butanediol. The racemisations and epimerisations at the octahedral centers of 7 organic tellurates were investigated by polarimetry and NMR spectroscopy. Half-lives at room temperature of ca. 1 s up to several hours were found. By the reaction of Te(OH)6 with (R,R)-tartaric acid and DMSO, a product with the composition Te2O14C8H4 4 DMSO was isolated."]},{"key":"dc:source","label":"Dc Source","values":["Aachen : Publikationsserver der RWTH Aachen University 207 S. : graph. Darst. (2001). = Aachen, Techn. Hochsch., Diss., 2001"]},{"key":"dc:title","label":"Title","values":["Synthese, Stereochemie und Eigenschaften einiger organischer Tellurate(VI)"]}]}],"canonical_facts":{"dc:contributor":["Laur, Peter"],"dc:coverage":["DE"],"dc:creator":["Bausch, Stephan"],"dc:date":["2001"],"dc:description":["2 known and 15 new organic tellurates(VI) were synthesised starting from Te(OH)6. Their stereochemistries were investigated by spectroscopic methods (IR, UV, CD, MCD, NMR, MS) and by X-ray analysis. Orthotellurates Te(OAlk)6 Alk = Me, Et and the binuclear tellurate [(EtO)5Te]2O were made by alkylations with trialkylorthoformiates. Cyclic tellurates were synthesised by the reaction of Te(OH)6 with neat 1,2-diols, by the reaction of diols or triols with the reaction mixture of the alkylation of Te(OH)6 with trialkylorthoformiates or by the transesterification of the tartaric ester function of {[(R)-MeOOCCHO]2}3Te with alcohols (EtOH, i-PrOH, n-BuOH). (Mononuclear) orthotellurates were synthesised from ethanediol; rac- and S-1,2-propanediol; meso-, rac- and (R,R)-2,3-butanediol; [(R)-AlkOOCCHOH]2 Alk = Me, Et, i-Pr; AlkC(CH2OH)3 Alk = Me, Et. Binuclear tellurates of the type (L2Te)2O2 were synthesised from LH2 = ethanediol; meso-, rac- and (R,R)-2,3-butanediol; 2,3-dimethyl-2,3-butanediol. X-ray analysis in the solid state exhibit a distorted TeO6-octahedron with (R,R)-dimethyltartrate as a diolato ligand for {[(R)-MeOOCCHO]2}3Te, an almost perfect TeO6-octahedron for [EtC(CH2O)3]2Te, 2 distorted TeO6-octahedra which are connected by edge-sharing oxygen atoms for the binuclear tellurate from rac-2,3-butanediol. The racemisations and epimerisations at the octahedral centers of 7 organic tellurates were investigated by polarimetry and NMR spectroscopy. Half-lives at room temperature of ca. 1 s up to several hours were found. By the reaction of Te(OH)6 with (R,R)-tartaric acid and DMSO, a product with the composition Te2O14C8H4 4 DMSO was isolated."],"dc:identifier":["https://publications.rwth-aachen.de/record/61919","https://publications.rwth-aachen.de/search?p=id:%22RWTH-CONV-123531%22"],"dc:language":["ger"],"dc:publisher":["Publikationsserver der RWTH Aachen University"],"dc:relation":["info:eu-repo/semantics/altIdentifier/urn/urn:nbn:de:hbz:82-opus-1436"],"dc:rights":["info:eu-repo/semantics/openAccess"],"dc:source":["Aachen : Publikationsserver der RWTH Aachen University 207 S. : graph. Darst. (2001). = Aachen, Techn. Hochsch., Diss., 2001"],"dc:subject":["info:eu-repo/classification/ddc/540","Chemie","Tellurorganische Verbindungen","Tellurate"],"dc:title":["Synthese, Stereochemie und Eigenschaften einiger organischer Tellurate(VI)"],"dc:type":["info:eu-repo/semantics/doctoralThesis","info:eu-repo/semantics/publishedVersion"]},"updated_at":"2026-07-30T19:43:19Z"}