{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/84219"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/84219","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Trispyrazolylborate and Tetramethylcyclopentadienyl Osmium Chemistry: Toward Methane Coordination Complexes","abstract":"Treatment of H2OsBr6 with 4 equiv. of tetramethylcyclopentadiene (C5Me4H2) in tert-butanol affords [(C 5Me4H)2OsBr]2[Os2Br 8]. The brown color of the salt suggests that the anion adopts an eclipsed conformation (D4h symmetry) and this conclusion has been confirmed by a single-crystal X-ray diffraction experiment. Treatment of [(C5Me 4H)2OsBr]2[Os2Br8] with excess 1,5-cyclooctadiene (cod) in refluxing ethanol gives (C5Me 4H)2Os and [(C5Me4H)2OsBr][Os 2HBr4(cod)2]. An X-ray crystallographic study of the latter compound indicates that the anion adopts a confacial bioctahedral structure in which the hydride ligand and two bromides bridge between the two osmium centers. This anion is the first example of an anionic diosmium complex containing a bridging hydride.","abstract_html":"Treatment of H2OsBr6 with 4 equiv. of tetramethylcyclopentadiene (C5Me4H2) in tert-butanol affords [(C 5Me4H)2OsBr]2[Os2Br 8]. The brown color of the salt suggests that the anion adopts an eclipsed conformation (D4h symmetry) and this conclusion has been confirmed by a single-crystal X-ray diffraction experiment. Treatment of [(C5Me 4H)2OsBr]2[Os2Br8] with excess 1,5-cyclooctadiene (cod) in refluxing ethanol gives (C5Me 4H)2Os and [(C5Me4H)2OsBr][Os 2HBr4(cod)2]. An X-ray crystallographic study of the latter compound indicates that the anion adopts a confacial bioctahedral structure in which the hydride ligand and two bromides bridge between the two osmium centers. This anion is the first example of an anionic diosmium complex containing a bridging hydride.","abstract_has_math":false,"creators":["Dickinson, Paul W."],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Chemistry","degree_department":null,"school":null,"contributors":["Girolami, G.S."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2015,"date_issued":"2015-09-25T22:13:31Z","date_published":"2015-09-25T22:13:31Z","updated_at":"2026-07-22T22:26:22Z","subjects":["Chemistry, Inorganic"],"languages":["eng"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["(MiAaPQ)AAI3223579"],"render_values":[{"text":"(MiAaPQ)AAI3223579","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/84219","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Girolami, G.S."]},{"key":"dc:creator","label":"Author","values":["Dickinson, Paul W."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2015-09-25T22:13:31Z","10000-01-01","2006"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Chemistry"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Chemistry, Inorganic"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/84219","(MiAaPQ)AAI3223579"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Treatment of H2OsBr6 with 4 equiv. of tetramethylcyclopentadiene (C5Me4H2) in tert-butanol affords [(C 5Me4H)2OsBr]2[Os2Br 8]. The brown color of the salt suggests that the anion adopts an eclipsed conformation (D4h symmetry) and this conclusion has been confirmed by a single-crystal X-ray diffraction experiment. Treatment of [(C5Me 4H)2OsBr]2[Os2Br8] with excess 1,5-cyclooctadiene (cod) in refluxing ethanol gives (C5Me 4H)2Os and [(C5Me4H)2OsBr][Os 2HBr4(cod)2]. An X-ray crystallographic study of the latter compound indicates that the anion adopts a confacial bioctahedral structure in which the hydride ligand and two bromides bridge between the two osmium centers. This anion is the first example of an anionic diosmium complex containing a bridging hydride.","Made available in DSpace on 2015-09-25T22:13:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3223579.pdf: 4285826 bytes, checksum: 9534c178685f18cbdc6b23f1f56a111f (MD5) Previous issue date: 2006","Embargo set by: Seth Robbins for item 85500 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","132 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006."]},{"key":"dc:title","label":"Title","values":["Trispyrazolylborate and Tetramethylcyclopentadienyl Osmium Chemistry: Toward Methane Coordination Complexes"]}]}],"canonical_facts":{"dc:contributor":["Girolami, G.S."],"dc:creator":["Dickinson, Paul W."],"dc:date":["2015-09-25T22:13:31Z","10000-01-01","2006"],"dc:description":["Treatment of H2OsBr6 with 4 equiv. of tetramethylcyclopentadiene (C5Me4H2) in tert-butanol affords [(C 5Me4H)2OsBr]2[Os2Br 8]. The brown color of the salt suggests that the anion adopts an eclipsed conformation (D4h symmetry) and this conclusion has been confirmed by a single-crystal X-ray diffraction experiment. Treatment of [(C5Me 4H)2OsBr]2[Os2Br8] with excess 1,5-cyclooctadiene (cod) in refluxing ethanol gives (C5Me 4H)2Os and [(C5Me4H)2OsBr][Os 2HBr4(cod)2]. An X-ray crystallographic study of the latter compound indicates that the anion adopts a confacial bioctahedral structure in which the hydride ligand and two bromides bridge between the two osmium centers. This anion is the first example of an anionic diosmium complex containing a bridging hydride.","Made available in DSpace on 2015-09-25T22:13:31Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3223579.pdf: 4285826 bytes, checksum: 9534c178685f18cbdc6b23f1f56a111f (MD5) Previous issue date: 2006","Embargo set by: Seth Robbins for item 85500 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs","U of I Only","132 p.","Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2006."],"dc:identifier":["http://hdl.handle.net/2142/84219","(MiAaPQ)AAI3223579"],"dc:language":["eng"],"dc:subject":["Chemistry, Inorganic"],"dc:title":["Trispyrazolylborate and Tetramethylcyclopentadienyl Osmium Chemistry: Toward Methane Coordination Complexes"],"dc:type":["text"],"thesis:degree_discipline":["Chemistry"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:26:22Z"}