{"id":{"repo_id":"unt","oai_identifier":"info:ark/67531/metadc3043"},"canonical_url":"https://search.dev.ndltd.org/etd/unt/info:ark/67531/metadc3043","repository":{"repo_id":"unt","name":"University of North Texas","base_url":"https://digital.library.unt.edu/oai/"},"display":{"title":"Substitution chemistry of the cobalt complexes RCCo3(CO)9 (R = H, CHO) with the diphosphine ligand: 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Syntheses, X-ray structures and reactivity.","abstract":"The reaction between the tetrahedrane cluster RCCo3(CO)9{R = CHO (1), H (3)} and the redox-active diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3- dione (bpcd) leads to the replacement of two CO groups and formation of RCCo3(CO)7(bpcd) {R = CHO (2), H (4)}. Clusters 2 and 4 are thermally unstable and readily transform into the new P-C bond cleavage cluster 5. All three clusters 2, 4, and 5 have been isolated and fully characterized in solution by IR and 31P NMR spectroscopy. VT 31P NMR data indicate that the bpcd ligand in RCCo3(CO)7(bpcd) is fluxional at 187 K in THF. Clusters 2, 4, and 5 have been structurally characterized by X-ray diffraction analyses.","abstract_html":"The reaction between the tetrahedrane cluster RCCo3(CO)9{R = CHO (1), H (3)} and the redox-active diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3- dione (bpcd) leads to the replacement of two CO groups and formation of RCCo3(CO)7(bpcd) {R = CHO (2), H (4)}. Clusters 2 and 4 are thermally unstable and readily transform into the new P-C bond cleavage cluster 5. All three clusters 2, 4, and 5 have been isolated and fully characterized in solution by IR and 31P NMR spectroscopy. VT 31P NMR data indicate that the bpcd ligand in RCCo3(CO)7(bpcd) is fluxional at 187 K in THF. Clusters 2, 4, and 5 have been structurally characterized by X-ray diffraction analyses.","abstract_has_math":false,"creators":["Liu, Jie"],"institution":"University of North Texas","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":["Richmond, Michael","Chyan, Oliver M. R.","Thomas, Ruthanne D."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2001,"date_issued":"2001-12","date_published":"2001-12","updated_at":"2026-07-24T05:34:52Z","subjects":["Cobalt compounds.","Transition metal complexes.","Ligand binding (Biochemistry)","Scission (Chemistry)","clusters","Co substitution","P-C bond activation","31P NMR"],"languages":["English"],"rights":["Public","Copyright","Liu, Jie","Copyright is held by the author, unless otherwise noted. All rights reserved."],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 52031843","https://digital.library.unt.edu/ark:/67531/metadc3043/","ark: ark:/67531/metadc3043"],"render_values":[{"text":"oclc: 52031843","href":null,"code":true},{"text":"https://digital.library.unt.edu/ark:/67531/metadc3043/","href":"https://digital.library.unt.edu/ark:/67531/metadc3043/","code":true},{"text":"ark: ark:/67531/metadc3043","href":null,"code":true}]}]},"links":{"outbound_url":"https://doi.org/10.12794/metadc3043","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Richmond, Michael","Chyan, Oliver M. R.","Thomas, Ruthanne D."]},{"key":"dc:creator","label":"Author","values":["Liu, Jie"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2001-12"]},{"key":"dc:publisher","label":"Institution","values":["University of North Texas"]},{"key":"dc:type","label":"Dc Type","values":["Thesis or Dissertation"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Cobalt compounds.","Transition metal complexes.","Ligand binding (Biochemistry)","Scission (Chemistry)","clusters","Co substitution","P-C bond activation","31P NMR"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["English"]},{"key":"dc:rights","label":"Dc Rights","values":["Public","Copyright","Liu, Jie","Copyright is held by the author, unless otherwise noted. All rights reserved."]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["oclc: 52031843","doi: 10.12794/metadc3043","https://digital.library.unt.edu/ark:/67531/metadc3043/","ark: ark:/67531/metadc3043"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The reaction between the tetrahedrane cluster RCCo3(CO)9{R = CHO (1), H (3)} and the redox-active diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3- dione (bpcd) leads to the replacement of two CO groups and formation of RCCo3(CO)7(bpcd) {R = CHO (2), H (4)}. Clusters 2 and 4 are thermally unstable and readily transform into the new P-C bond cleavage cluster 5. All three clusters 2, 4, and 5 have been isolated and fully characterized in solution by IR and 31P NMR spectroscopy. VT 31P NMR data indicate that the bpcd ligand in RCCo3(CO)7(bpcd) is fluxional at 187 K in THF. Clusters 2, 4, and 5 have been structurally characterized by X-ray diffraction analyses."]},{"key":"dc:format","label":"Dc Format","values":["Text"]},{"key":"dc:title","label":"Title","values":["Substitution chemistry of the cobalt complexes RCCo3(CO)9 (R = H, CHO) with the diphosphine ligand: 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Syntheses, X-ray structures and reactivity."]}]}],"canonical_facts":{"dc:contributor":["Richmond, Michael","Chyan, Oliver M. R.","Thomas, Ruthanne D."],"dc:creator":["Liu, Jie"],"dc:date":["2001-12"],"dc:description":["The reaction between the tetrahedrane cluster RCCo3(CO)9{R = CHO (1), H (3)} and the redox-active diphosphine ligand 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3- dione (bpcd) leads to the replacement of two CO groups and formation of RCCo3(CO)7(bpcd) {R = CHO (2), H (4)}. Clusters 2 and 4 are thermally unstable and readily transform into the new P-C bond cleavage cluster 5. All three clusters 2, 4, and 5 have been isolated and fully characterized in solution by IR and 31P NMR spectroscopy. VT 31P NMR data indicate that the bpcd ligand in RCCo3(CO)7(bpcd) is fluxional at 187 K in THF. Clusters 2, 4, and 5 have been structurally characterized by X-ray diffraction analyses."],"dc:format":["Text"],"dc:identifier":["oclc: 52031843","doi: 10.12794/metadc3043","https://digital.library.unt.edu/ark:/67531/metadc3043/","ark: ark:/67531/metadc3043"],"dc:language":["English"],"dc:publisher":["University of North Texas"],"dc:rights":["Public","Copyright","Liu, Jie","Copyright is held by the author, unless otherwise noted. All rights reserved."],"dc:subject":["Cobalt compounds.","Transition metal complexes.","Ligand binding (Biochemistry)","Scission (Chemistry)","clusters","Co substitution","P-C bond activation","31P NMR"],"dc:title":["Substitution chemistry of the cobalt complexes RCCo3(CO)9 (R = H, CHO) with the diphosphine ligand: 4,5-bis(diphenylphosphino)-4-cyclopenten-1,3-dione (bpcd). Syntheses, X-ray structures and reactivity."],"dc:type":["Thesis or Dissertation"]},"updated_at":"2026-07-24T05:34:52Z"}