{"id":{"repo_id":"lethbridge","oai_identifier":"oai:opus.uleth.ca:10133/5652"},"canonical_url":"https://search.dev.ndltd.org/etd/lethbridge/oai:opus.uleth.ca:10133/5652","repository":{"repo_id":"lethbridge","name":"University of Lethbridge","base_url":"https://opus.uleth.ca/server/oai/request"},"display":{"title":"Towards terminal rare earth imido complexes","abstract":"The development of rare earth complexes supported by a bisphosphinimine pyrrole-based pincer ligands is described herein. Synthesis of these species was conducted via alkane elimination and salt metathesis pathways. These complexes and their precursors were prepared and characterized by multi-dimensional (1-, pseudo-2-, and 2-dimensional), multi-nuclear (1H, 2H, 11B, 13C, 19F, and 31P) NMR spectroscopy, single-crystal X-ray diffraction analysis and elemental analysis. Systematic modifications to the ancillary ligand and the resulting impact on complex reactivity is also presented with the ultimate goal of generating a species that bears a rare earth-nitrogen double bond. Specifically, electron withdrawing (Ph) and donating (iPr) groups were installed on the phosphinimine P atoms of the ligand and Pipp (4-iPrC6H4) and Pm (4,6-dimethylpyrimidine) were utilized on the phosphinimine nitrogen atoms. Each iteration of the ancillary ligand led to distinct and unique reactivities upon complexation to a rare earth metal.","abstract_html":"The development of rare earth complexes supported by a bisphosphinimine pyrrole-based pincer ligands is described herein. Synthesis of these species was conducted via alkane elimination and salt metathesis pathways. These complexes and their precursors were prepared and characterized by multi-dimensional (1-, pseudo-2-, and 2-dimensional), multi-nuclear (1H, 2H, 11B, 13C, 19F, and 31P) NMR spectroscopy, single-crystal X-ray diffraction analysis and elemental analysis. Systematic modifications to the ancillary ligand and the resulting impact on complex reactivity is also presented with the ultimate goal of generating a species that bears a rare earth-nitrogen double bond. Specifically, electron withdrawing (Ph) and donating (iPr) groups were installed on the phosphinimine P atoms of the ligand and Pipp (4-iPrC6H4) and Pm (4,6-dimethylpyrimidine) were utilized on the phosphinimine nitrogen atoms. Each iteration of the ancillary ligand led to distinct and unique reactivities upon complexation to a rare earth metal.","abstract_has_math":false,"creators":["Knott, Jackson P.","University of Lethbridge. Faculty of Arts and Science"],"institution":null,"degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2019,"date_issued":"2019","date_published":"2019","updated_at":"2026-07-27T20:02:32Z","subjects":["Diphosphonates","Organotransition metal compounds","Rare earth metal compounds","Rare earth metals"],"languages":[],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["hdl:10133/5652"],"render_values":[{"text":"hdl:10133/5652","href":null,"code":true}]}]},"links":{"outbound_url":null,"outbound_label":null,"outbound_source":null},"metadata_groups":[{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.issued","label":"Date","values":["2019"]},{"key":"dc:type","label":"Dc Type","values":["Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Diphosphonates","Organotransition metal compounds","Rare earth metal compounds","Rare earth metals"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["hdl:10133/5652"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.other","label":"Dc Description Other","values":["The development of rare earth complexes supported by a bisphosphinimine pyrrole-based pincer ligands is described herein. Synthesis of these species was conducted via alkane elimination and salt metathesis pathways. These complexes and their precursors were prepared and characterized by multi-dimensional (1-, pseudo-2-, and 2-dimensional), multi-nuclear (1H, 2H, 11B, 13C, 19F, and 31P) NMR spectroscopy, single-crystal X-ray diffraction analysis and elemental analysis. Systematic modifications to the ancillary ligand and the resulting impact on complex reactivity is also presented with the ultimate goal of generating a species that bears a rare earth-nitrogen double bond. Specifically, electron withdrawing (Ph) and donating (iPr) groups were installed on the phosphinimine P atoms of the ligand and Pipp (4-iPrC6H4) and Pm (4,6-dimethylpyrimidine) were utilized on the phosphinimine nitrogen atoms. Each iteration of the ancillary ligand led to distinct and unique reactivities upon complexation to a rare earth metal."]},{"key":"dc:title","label":"Title","values":["Towards terminal rare earth imido complexes"]}]}],"canonical_facts":{"dc:date.issued":["2019"],"dc:description.other":["The development of rare earth complexes supported by a bisphosphinimine pyrrole-based pincer ligands is described herein. Synthesis of these species was conducted via alkane elimination and salt metathesis pathways. These complexes and their precursors were prepared and characterized by multi-dimensional (1-, pseudo-2-, and 2-dimensional), multi-nuclear (1H, 2H, 11B, 13C, 19F, and 31P) NMR spectroscopy, single-crystal X-ray diffraction analysis and elemental analysis. Systematic modifications to the ancillary ligand and the resulting impact on complex reactivity is also presented with the ultimate goal of generating a species that bears a rare earth-nitrogen double bond. Specifically, electron withdrawing (Ph) and donating (iPr) groups were installed on the phosphinimine P atoms of the ligand and Pipp (4-iPrC6H4) and Pm (4,6-dimethylpyrimidine) were utilized on the phosphinimine nitrogen atoms. Each iteration of the ancillary ligand led to distinct and unique reactivities upon complexation to a rare earth metal."],"dc:identifier":["hdl:10133/5652"],"dc:subject":["Diphosphonates","Organotransition metal compounds","Rare earth metal compounds","Rare earth metals"],"dc:title":["Towards terminal rare earth imido complexes"],"dc:type":["Thesis"]},"updated_at":"2026-07-27T20:02:32Z"}